flour moth vs pyralid

flour moth

noun

  • Any one of several small moths of the Pyralidae family whose larvae feed on flour 

pyralid

noun

  • A moth of the family Pyralidae. 

adj

  • Pertaining to the Pyralidae family of moths. 

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