elicit vs pick up on

elicit

verb
  • To draw out, bring out, bring forth (something latent); to obtain information from someone or something. 

  • To use logic to arrive at truth; to derive by reason 

  • To evoke, educe (emotions, feelings, responses, etc.); to generate, obtain, or provoke as a response or answer. 

pick up on

verb
  • To notice, observe, learn, or understand, especially something otherwise overlooked. 

  • To adopt a practice in which others already engage. 

  • To continue or build upon (for example, a task, analysis, or narrative), beginning from a point at which someone has previously stopped. 

How often have the words elicit and pick up on occurred in a corpus of books? (source: Google Ngram Viewer )