brass ovaries vs oomph

brass ovaries

noun

  • courage, guts 

oomph

noun

  • Strength, power, passion or effectiveness; clout. 

  • A bassy grunting or thudding sound. 

  • Sex appeal. 

verb

  • To produce a bassy grunting or thudding sound. 

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