bass viol vs violin

bass viol

noun
  • A fretted, bowed, stringed musical instrument from the viola da gamba family. It occupies the bass range and is the lowest instrument in the family. Similar to (but smaller than) a cello. 

violin

noun
  • A small unfretted stringed instrument with four strings tuned (lowest to highest) G-D-A-E, usually held against the chin and played with a bow. 

  • Any instrument of the violin family, always inclusive of violins, violas, and cellos and sometimes further including the double bass. 

  • The position of a violinist in an orchestra or group. 

verb
  • To play on, or as if on, a violin. 

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