"Me either," said Mrs. Treacher, idiomatically, and bent over the basket.
"Major Vigoureux"
A. T. Quiller-Couch
53. It is true, that in our language the word there is thus used idiomatically, as an introductory term, when we tell what is taking, or has taken, place; but still it is a regular adverb of place, and relates to the verb agreeably to the common rule for adverbs.
"The Grammar of English Grammars"
Goold Brown
Yet he spoke it fluently, eloquently, and even idiomatically.
"Correspondence & Conversations of Alexis de Tocqueville with Nassau William Senior from 1834 to 1859, Vol. 2"
Alexis de Tocqueville