American Heritage Dictionary
(1)
Century Dictionary
(4)
GNU Webster's 1913
(1)
WordNet
(1)
Elsewhere on the web
I know that there has been great literary debate over whether the governess was actually crazy of if there were, in fact, ghosts.— BiblioAddict
She considered, most unreasonably, that her governess was the alternative of the pony, and that if she were without the one she might possibly acquire the other.— The New Girl at St. Chad's A Story of School Life
She knew that a governess was an impossible item in Manchester House, as things went.— The Lost Girl

American Heritage Dictionary (1)
Century Dictionary (2)
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You can expect to see this word about once a week.