firebomber vs singe

firebomber

noun
  • One who carries out a firebombing attack. 

singe

noun
  • A burning of the surface; a slight burn. 

verb
  • To burn slightly. 

  • To remove the nap of (cloth), by passing it rapidly over a red-hot bar, or over a flame, preliminary to dyeing it. 

  • To remove the hair or down from (a plucked chicken, etc.) by passing it over a flame. 

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