lead up to vs suggest

lead up to

verb
  • To set in motion; to act as a causal or preparatory event or sequence of events. 

  • To follow or mark a path toward. 

  • To precede in time. 

suggest

verb
  • To cause one to suppose (something); to bring to one's mind the idea (of something). 

  • To explicitly mention (something) as a possibility for consideration, often to recommend it 

  • To imply but stop short of explicitly stating (something). 

How often have the words lead up to and suggest occurred in a corpus of books? (source: Google Ngram Viewer )