Do you want to count idiosyncratic words, phonologically constant forms or only utterances which are clearly recognisable as conventional words?

"What can one expect to have changed other than idiosyncratic form?"

That's where I got my sense of his idiosyncratic form of charisma.

It can therefore be read as an idiosyncratic form of autobiography.

Sometime after 1520, Zwingli's theological model began to evolve into an idiosyncratic form that was neither Erasmian nor Lutheran.

The manifestations of grief can be confounding to us all, and I can't pretend to fully understand why your mother's distress has taken such idiosyncratic forms.

Others may privately use idiosyncratic forms borrowed from a wide range of Christian traditions.

Pratchett represents this idiosyncratic form of communication in simple plain text, without quotations, and italicized in some books.

Some grandmasters dislike blindfold rapid chess, or so they have been known to say, but this idiosyncratic form of the game always attracts a good crowd.

In photography, traditional, postmodernist and idiosyncratic forms of expression didn't so much battle it out in 1988 as peaceably coexist.