collect vs expand

collect

verb
  • To accumulate (a number of similar or related objects), particularly for a hobby or recreation. 

  • To get; particularly, get from someone. 

  • To infer; to conclude. 

  • To gather together; amass. 

  • To come together in a group or mass. 

  • To collect payments. 

  • To collide with or crash into (another vehicle or obstacle). 

noun
  • The prayer said before the reading of the epistle lesson, especially one found in a prayerbook, as with the Book of Common Prayer. 

adj
  • To be paid for by the recipient, as a telephone call or a shipment. 

adv
  • With payment due from the recipient. 

expand

verb
  • To increase the extent, number, volume or scope of (something). 

  • To become, by rewriting, a longer, yet equivalent sum of terms. 

  • To feel generous or optimistic. 

  • To multiply both the numerator and the denominator of a fraction by the same natural number yielding a fraction of equal value 

  • To change (something) from a smaller form or size to a larger one; to spread out or lay open. 

  • To change or grow from smaller to larger in form, number, or size. 

  • To rewrite (an expression) as a longer, yet equivalent sum of terms. 

  • To express (something) at length and/or in detail. 

  • To increase in extent, number, volume or scope. 

  • To speak or write at length or in detail. 

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