hour vs preadolescence

hour

noun
  • A season, moment, or time. 

  • The time. 

  • Used after a two-digit hour and a two-digit minute to indicate time. 

  • A time period of sixty minutes; one twenty-fourth of a day. 

  • The set times of prayer, the canonical hours, the offices or services prescribed for these, or a book containing them. 

  • A distance that can be traveled in one hour. 

preadolescence

noun
  • The period between childhood and adolescence, between the ages of about 9 and 11 for girls, and 10 and 12 for boys. 

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