wavelet vs whitecap

wavelet

noun
  • A small wave; a ripple. 

  • A fast-decaying oscillation. 

whitecap

noun
  • A wave having a white crest; a breaker 

  • Any of several birds having a white patch on the head 

  • A member of a self-appointed vigilante committee that carried out lynchings. Some early ones wore white hoods or masks. 

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