American Heritage Dictionary
(1)
Century Dictionary
GNU Webster's 1913
WordNet
Elsewhere on the web
"The fact is, there's something brewin 'in the fo'c's'le, and I want to get to the bottom of it.— The Cruise of the "Esmeralda"
I don't want to quarrel with you, Joe; I'd a deal rather we was all fast friends in the fo'c's'le.— The Cruise of the "Esmeralda"
I see you knows somethin 'as I thought nobody in the fo'c's'le knowed anything about but myself.— The Cruise of the "Esmeralda"
The sailors gams about it nights when they thinks I'm asleep in the fo'c's'le.— A Man to His Mate
Glancing over his shoulder, Jeremy saw most of the crew lolled about forward of the fo'c's'le hatch.— The Black Buccaneer

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 year.