collect vs let go

collect

verb
  • To infer; to conclude. 

  • To get; particularly, get from someone. 

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

  • 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). 

adv
  • With payment due from the recipient. 

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. 

let go

verb
  • Used other than figuratively or idiomatically: see let, go. 

  • To dismiss from employment. 

  • To release from one's grasp; to go from a state of holding on to a state of no longer holding on. 

  • To ignore (a comment, etc.). 

  • To emotionally disengage or to distract oneself from a situation. 

  • To fail to maintain a standard of appearance, behavior, or performance. 

  • To gain weight 

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