American Heritage Dictionary
(6)
Century Dictionary
(6)
GNU Webster's 1913
(2)
WordNet
(4)
Elsewhere on the web
His discourse was addressed to myself; but his voice, although by no means loud, had that intonation which is commonly employed in speaking to some one at a great distance.— krimiblog.de
But however different their intonation, their rapport shows a chemistry that can only come from the sisterhood of the music industry.
Make sure the intonation is spot on. crazymandolinist— Mandolin Cafe News
Under the Rorschach mask, his guttural growling of narration along the lines of calling Manhattan "an abattoir of retarded children" or a "city dying of rabies" is monotonous, but with the mask off, interacting with others, his every intonation is as pungent as if he were biting into a metal file with every word.— Movie City News

Century Dictionary (2)
Bubble size: how much this word was used in a year
Bubble height: used more or less than expected, vs. all uses evenly distributed
You can expect to see this word about twice a month.