keep one's shirt on vs throw one's toys out of the pram

keep one's shirt on

verb
  • To be more patient; to calm down. 

throw one's toys out of the pram

verb
  • To lose one's temper; to throw a tantrum. 

How often have the words keep one's shirt on and throw one's toys out of the pram occurred in a corpus of books? (source: Google Ngram Viewer )