liminal vs maiden

liminal

adj
  • Of or pertaining to a beginning or first stage of a process. 

  • Of or pertaining to an entrance or threshold. 

maiden

adj
  • Being a first occurrence or event. 

  • Grown from seed and never pruned 

  • Fresh; innocent; unpolluted; pure; hitherto unused. 

  • Virgin. 

  • Never having been captured or violated. 

  • Without offspring. 

  • Like or befitting a (young, unmarried) maiden. 

  • Being an over in which no runs are scored. 

noun
  • A clothes maiden. 

  • A girl or an unmarried young woman. 

  • A maiden over. 

  • A racehorse without any victory, i.e. one having a "virgin record". 

  • A female virgin. 

  • A Scottish counterpart of the guillotine. 

  • A maidservant. 

  • A horse race in which all starters are maidens. 

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