early vs hour

early

noun
  • A shift (scheduled work period) that takes place early in the day. 

adv
  • At a time before expected; sooner than usual. 

  • Soon; in good time; seasonably. 

adj
  • Near the start or beginning. 

  • Near the start of the day. 

  • Having begun to occur; in its early stages. 

  • At a time in advance of the usual or expected event. 

  • Arriving a time before expected; sooner than on time. 

  • Of a star or class of stars, hotter than the sun. 

hour

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

  • A season, moment, or time. 

  • The time. 

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

  • 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. 

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