oomph vs pep

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. 

pep

noun
  • Energy, high spirits. 

verb
  • To inject with energy and enthusiasm. 

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