turn of expression vs turn of phrase

turn of expression and turn of phrase both are nouns.

Word	Noun	Adjective	Verb	Adverb
turn of expression	Yes	No	No	No
turn of phrase	Yes	No	No	No

As nouns, turn of expression and turn of phrase are synonyms defined as:

turn of expression and turn of phrase: a distinctive spoken or written expression

turn of expression (noun)	turn of phrase (noun)
a distinctive spoken or written expression	a distinctive spoken or written expression