executant vs singer

executant

noun
  • A person who executes a dance or piece of music; a performer. 

  • A person who puts something into action, such as a plan or design. 

singer

noun
  • dance figure with a fixed structure, sung by a caller, or a piece of music with that structure. 

  • A person who sings, often professionally. 

  • A machine for singeing cloth. 

  • A person who, or device which, singes. 

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