allow for vs leave out

allow for

verb
  • To take into account when making plans. 

  • To make possible. 

leave out

verb
  • Used other than figuratively or idiomatically: see leave, out. 

  • To omit, to not include, to neglect to mention. 

How often have the words allow for and leave out occurred in a corpus of books? (source: Google Ngram Viewer )