air raid vs pounding

air raid

noun
  • An attack on a surface target by aircraft. 

  • A passing-heavy offensive scheme based on a shotgun formation with four wide receivers and a single running back. 

pounding

noun
  • An act in which something or someone is pounded. 

adj
  • Characterized by heavy or loud throbs 

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