alto vs cello

alto

noun
  • A person or musical instrument that performs the alto part. 

  • A musical part or section higher than tenor and lower than soprano, formerly the part that performed a countermelody above the tenor or main melody. 

  • An alto saxophone 

cello

noun
  • A large unfretted stringed instrument of the violin family with four strings tuned (lowest to highest) C-G-D-A and an endpin to support its weight, usually played with a bow. 

  • cellophane 

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