bottleneck vs handicap

bottleneck

verb
  • To form a bottleneck. 

  • To slow by causing 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. 

handicap

verb
  • To place at disadvantage. 

  • To estimate betting odds. 

  • To encumber with a handicap in any contest. 

noun
  • Something that prevents, hampers, or hinders. 

  • An allowance of a certain amount of time or distance in starting, granted in a race (or other contest of skill) to the competitor possessing disadvantages; or an additional weight or other hindrance imposed upon the one possessing advantages, in order to equalize, as much as possible, the chances of success. 

  • The disadvantage itself, in particular physical or mental disadvantages of people. 

  • A race or similar contest in which there is an allowance of time, distance, weight, or other advantage, to equalize the chances of the competitors. 

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