gamba vs viol

gamba

noun
  • A rank of organ pipes, so called for a supposed resemblance of the sound to that of a viola da gamba. 

  • The metacarpus or metatarsus of ruminants, etc. 

viol

noun
  • A stringed instrument related to the violin family, but held in the lap between the legs like a cello, usually with C-holes, a flat back, a fretted neck and six strings, played with an underhanded bow hold 

  • A large rope used to manipulate the anchor 

verb
  • To play the viol. 

How often have the words gamba and viol occurred in a corpus of books? (source: Google Ngram Viewer )