turn of phrase vs turn of expression

turn of phrase and turn of expression both are nouns.

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

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

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

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