Speedo vs bikini

Speedo

noun
  • A tight-fitting swimsuit, especially commonly worn by competitive swimmers and divers. Usually implies a brief or bikini style swimsuit. 

  • (by restriction) A male swimsuit, very tight fitting and small, brief-style, and not a thong-type. 

bikini

noun
  • A brief two-piece bathing suit worn by girls and women, especially one that exposes the midriff and navel. 

  • A brief bathing suit worn by men. 

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