dip into vs trouser

dip into

verb
  • To spend some of a source of money (such as one's savings). 

  • Used other than figuratively or idiomatically: dip into. 

  • To read, examine or engage in (something) in a cursory or casual manner. 

trouser

verb
  • To take and keep (something, especially money, that is not one's own); to pocket. 

  • To secretively steal (an item or money) for personal use. 

  • To put (money) into one's trouser pocket; to pocket. 

noun
  • A pair of trousers. 

  • Of or relating to trousers. 

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