heartbeat vs New York minute

heartbeat and New York minute both are nouns.

Word	Noun	Adjective	Verb	Adverb
heartbeat	Yes	No	No	No
New York minute	Yes	No	No	No

As nouns, heartbeat and New York minute are synonyms defined as:

heartbeat and New York minute: a very short time (as the time it takes the eye to blink or the heart to beat)

Other synonyms of heartbeat include blink of an eye, flash, instant, jiffy, split second, trice, twinkling, wink.

heartbeat (noun)	New York minute (noun)
an animating or vital unifying force	a very short time (as the time it takes the eye to blink or the heart to beat)
the rhythmic contraction and expansion of the arteries with each beat of the heart
a very short time (as the time it takes the eye to blink or the heart to beat)