combo vs heptad

combo

noun
  • A combination. 

  • A strategy aiming to win by playing a specific combination of cards (or similar), often in a single turn. 

  • Two or more gameplay elements (e.g. characters, items) which are powerful when used together. 

  • A Caucasian man who marries or has a sexual relationship with an Aboriginal woman; a Caucasian man who lives among Aboriginal people and adopts Aboriginal culture 

  • A combo box. 

  • A small musical group. 

  • An action composed of a sequence of simpler actions, especially a composite attacking move in a fighting game. 

verb
  • To combine 

heptad

noun
  • Synonym of septet: a group of seven things. 

  • A sequence of seven bases. 

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