be proper for vs suffice

be proper for

suffice

verb
  • To be enough or sufficient; to meet the need (of anything); to be adequate; to be good enough. 

  • To furnish; to supply adequately. 

  • To satisfy; to content; to be equal to the wants or demands of. 

How often have the words be proper for and suffice occurred in a corpus of books? (source: Google Ngram Viewer )