niminy-piminy vs po-faced

niminy-piminy

adj

  • overtly or excessively prim 

noun

  • affected delicacy; mincingness 

po-faced

adj

  • Wearing a particularly stern and disapproving expression; humourless; priggish. 

  • Poker-faced. 

How often have the words niminy-piminy and po-faced occurred in a corpus of books? (source: Google Ngram Viewer )