hi/lo vs high-low

hi/lo

high-low

adj
  • Describing a game in which the high hand and the low hand win. 

  • Designating a blackjack card counting technique in which the lowest cards are worth +1 point and the highest cards -1 point, and the counter places higher bets against higher point totals. 

noun
  • A card game where a player has to guess if the next card will be higher or lower than the one shown. 

How often have the words hi/lo and high-low occurred in a corpus of books? (source: Google Ngram Viewer )