American Heritage Dictionary
(2)
Century Dictionary
(2)
GNU Webster's 1913
(1)
WordNet
(1)
Elsewhere on the web
If all three fail then the last machination is Bheet or sowing seeds of dissension and discord.— Kafila
The most critical distinction of Stephane over other movie simpletons is his capacity for machination: Sautet's script lays several clues as to his motivations in disrupting the affair between Maxime and Camille, but leaves him as much as an enigma as when it found him.— The House Next Door
What was cool was that it didn't take much machination, even in the writing of the script, because the characters live.— The IESB
What far-reaching machination was he so laboriously evolving?— The Paternoster Ruby
No wonder that the men of old had firm faith in the existence of all kinds of flying machines and creatures They believed that fiery dragons were created by infernal machination, which, although not what we may call natural creatures, were nevertheless supposed to rush impetuous through the sky, vomiting flames and scattering the seeds of pestilence far and wide.— Up in the Clouds Balloon Voyages

Century Dictionary (1)
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 once a year.