ask for trouble vs look for trouble

ask for trouble

verb
  • To behave in a way that is likely to cause problems. 

look for trouble

verb
  • to do things that are likely to cause problems. 

  • to deliberately act in a way that's likely to lead to a fight. 

How often have the words ask for trouble and look for trouble occurred in a corpus of books? (source: Google Ngram Viewer )