frequently

As an adjective regular

is bound by religious rule; belonging to a monastic or religious order (often as opposed to {{term|secular}}).

As a noun regular

is a member of the British Army (as opposed to a member of the Territorial Army or Reserve).

As an adverb frequently is

at frequent intervals.

As an adverb frequently

is at frequent intervals.

As a noun null is

zero, nil; the cardinal number before einn.

As adverbs the difference between therefore and frequently

is that therefore is (conjunctive) for that or this purpose, referring to something previously stated while frequently is at frequent intervals.

As adverbs the difference between mainly and frequently

is that mainly is forcefully, vigorously while frequently is at frequent intervals.

As adverbs the difference between frequently and invariably

is that frequently is at frequent intervals while invariably is every time; always without change.

As adverbs the difference between continually and frequently

is that continually is in a continuous manner; non-stop while frequently is at frequent intervals.

As adverbs the difference between frequently and alot

is that frequently is at frequent intervals while alot is .

As a noun alot is

.

As adverbs the difference between alternately and frequently

is that alternately is in reciprocal succession; succeeding by turns; in alternate order while frequently is at frequent intervals.

As adverbs the difference between mostly and frequently

is that mostly is mainly or chiefly; for the most part; usually, generally, on the whole while frequently is at frequent intervals.

As adverbs the difference between fluently and frequently

is that fluently is in a fluent manner, as expressing oneself easily, especially in a foreign language while frequently is at frequent intervals.