heart and soul vs body and soul

heart and soul is a noun but body and soul is not a noun.

Word	Noun	Adjective	Verb	Adverb
heart and soul	Yes	No	No	Yes
body and soul	No	No	No	Yes

As adverbs, heart and soul and body and soul are synonyms defined as:

heart and soul (noun)	body and soul (noun)
the choicest or most essential or most vital part of some idea or experience

heart and soul (adverb)	body and soul (adverb)
with complete faith	with complete faith