my foot vs tsk tsk

my foot

intj
  • Indicates disapproval, disregard, disdain, disgust or disbelief. 

  • Used other than figuratively or idiomatically: see my, foot. 

tsk tsk

intj
  • An exclamation of disapproval. 

noun
  • The sound of such an exclamation of disapproval. 

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