oomph vs rumpy-pumpy

oomph

noun

  • Sex appeal. 

  • A bassy grunting or thudding sound. 

  • Strength, power, passion or effectiveness; clout. 

verb

  • To produce a bassy grunting or thudding sound. 

rumpy-pumpy

noun

  • Sexual intercourse. 

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