bottleneck vs choke point

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. 

choke point

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