bottleneck vs indulge

bottleneck

verb
  • To slow by causing a bottleneck. 

  • To form a bottleneck. 

noun
  • The part of a process that is too slow or cumbersome. 

  • In traffic, any narrowing of the road, especially resulting in a delay. 

  • The narrow portion that forms the pouring spout of a bottle; the neck of a bottle. 

indulge

verb
  • To grant an extension to the deadline of a payment. 

  • To give way to (a habit or temptation); to not oppose or restrain. 

  • To satisfy the wishes or whims of. 

  • To grant as by favour; to bestow in concession, or in compliance with a wish or request. 

  • To yield to a temptation or desire. 

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