apportion vs keep from

apportion

verb
  • To divide and distribute portions of a whole. 

  • Specifically, to do so in a fair and equitable manner; to allocate proportionally. 

keep from

verb
  • To make and cause to remain secret. 

  • To protect or preserve from. 

  • To prevent or restrain (someone or something) from; to refrain or cause to refrain from. 

  • To cause to be excluded or not present. 

How often have the words apportion and keep from occurred in a corpus of books? (source: Google Ngram Viewer )