fuck about vs screw around

fuck about

verb
  • To waste time with unimportant activities, often used as an admonition to urge the other party to stop wasting time. 

  • To fool around. 

screw around

verb
  • To waste time; to dawdle; to play or idle. 

  • To make out or engage in sexual activity, usually without actually having sex. 

  • To have sex with multiple partners; to sleep around. 

  • To harass and annoy someone. 

How often have the words fuck about and screw around occurred in a corpus of books? (source: Google Ngram Viewer )