idiomaticity

1. (uncountable)The quality of being idiomatic.

   Idi­o­ma­ti­zi­tät

2. (countable, rare)An instance or category of instances of that quality.

3. (countable, rare)The state of a linguistic expression which exists when the expression exhibits semantic-pragmatic divergence, when the semantic value of the expression differs from its pragmatic value; that is to say, idiomaticity exists when the inherent meaning of the words expressed does not match the meaning of the expression as understood by the users: the sayer(s) and hearer(s).

regular