Difference between Infrequent and Rare

INFREQUENT vs RARE: ADJECTIVE

Marked by an uncommon quality; especially superlative or extreme of its kind
Having low density
Not widely distributed
Not widely known; especially valued for its uncommonness
(of meat) cooked a short time; still red inside
Infrequently occurring; uncommon.
Excellent; extraordinary.
Thin in density; rarefied.
Cooked just a short time so as to retain juice and redness.
Thin; of low density
Very uncommon; scarce.
Cooked very lightly, so the meat is still red (in the case of steak or beef in the general sense).
Characterized by wide separation of parts; of loose texture; not thick or dense; thin.
Thinly scattered; dispersed.
Of an uncommon nature; unusually excellent; valuable to a degree seldom found.
Not frequent; seldom met with or occurring; unusual.
Nearly raw; partially cooked; not thoroughly cooked; underdone.
Recurring only at long intervals

Not frequent or customary; rare; uncommon; unaccustomed.
In zoology, being, as component parts, far removed from one another; distant; not numerous or close: as, infrequent spines, punctures, etc.
In botany, distant; sparsely placed: said of punctures, glands, hairs, etc.
Not frequent

Early.
Not thoroughly cooked; partly cooked; underdone: applied to meat: as, rare beef; a rare chop.
A dialectal form of rear.
An obsolete form of roar.
Thin; porous; not dense; of slight consistence; rarefied; having relatively little matter in a given volume: as, a rare substance; the rare atmosphere of high mountains.
Thinly scattered; coming or occurring at wide intervals; sparse; dispersed.
Very uncommon or infrequent; seldom occurring or to be found; hardly ever met with.
Hence Remarkable from uncommonness; especially, uncommonly good, excellent, valuable, fine, or the like; of an excellence seldom met with.
Synonyms Rare, Scarce, infrequent, unusual. Rare implies that only few of the kind exist: as, perfect diamonds are rare. Scarce properly implies a previous or usual condition of greater abundance. Rare, means that there are much fewer of a kind to be found than may be found where scarce would apply.
Singular, extraordinary, incomparable, choice.
(of meat) cooked a short time
Marked by an uncommon quality
Not widely known
Still red inside

Low, Scant, Prevalent, Casual, Common, Few, Episodic, Scarce, Unusual, Sparse, Uncommon, Rarely, Frequent, Rare, Occasional

Seldom, Remarkable, Atypical, Rarely, Unheard, Unusual, Rarity, Thin, Raw, Rarefied, Scarce, Rarified, Extraordinary, Infrequent, Uncommon

Low, Scant, Prevalent, Casual, Common, Few, Episodic, Scarce, Unusual, Sparse, Uncommon, Rarely, Frequent, Rare, Occasional

Seldom, Remarkable, Atypical, Rarely, Unheard, Unusual, Rarity, Thin, Raw, Rarefied, Scarce, Rarified, Extraordinary, Infrequent, Uncommon

Regret following transition is not an infrequent phenomenon.
Regular customers require different marketing than infrequent ones.
Infrequent or random exercise will do little good.
Achilles tendon rupture or injury is not infrequent.
However, gestures were relatively infrequent in this setting.
There are two basic properties: the subset of frequent itemset is also frequent itemset, the superset of infrequent items is also an infrequent itemset.
Infrequent or weak ovulation will often reveal itself as oligomenorrhea, or infrequent periods.
Conversely, if an itemset is infrequent, then all of its supersets must be infrequent too.
Similarly, for any infrequent itemset, all its supersets must be infrequent too.
Infrequent writes and infrequent reads to the LBA range indicated.

They exceeded expectations, which is rare these days.
Practical Methods for Sampling Rare and Mobile Populations.
This is an optional step, and is generally only used if your card is an ultra rare, a rare holo or a promo.
Rare Fish Tracker helps you keep track of the rare fish you have caught in your pursuit of fishing achievements.
Bipolar disorder is extremely rare in children, and although it can begin in adolescence, this is also rare.
The Drum Broker has launched Rare Rhythm Paints, a sample pack featuirng a collection of original and rare percussion samples by Dougles Fitch.
Rare birds: A few rare bird species were mapped using data supplied by MD DNR from their Ecologically Significant Areas database.
Nicely rare or medium rare, they are moved to rest and the pan deglazed with red wine.
Rare Coin Investments for decades has consistently offered better quality in rare coins.
Other symptoms may be rare or very rare.