handicap vs logrolling

handicap

verb
  • To estimate betting odds. 

  • To encumber with a handicap in any contest. 

  • To place at disadvantage. 

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. 

logrolling

noun
  • The act of balancing on a log floating on a river to guide it downstream, often involving rolling it using one's feet; birling. 

  • Mutual recommendation of friends' or colleagues' services or products, such as book recommendations in literary reviews. 

  • The rolling of logs from one place to another; an occasion when people meet to help each other roll logs. 

  • A concerted effort to push forward mutually advantageous legislative agendas by combining two items, either or both of which might fail on its own, into a single bill that is more likely to pass. 

  • A sport in which two people balance on a log floating in a body of water, each one aiming to cause the opponent to fall off by rolling or kicking the log. 

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