daytime vs peep of day

daytime

noun

  • The time of daylight; the time between sunrise and sunset. 

adj

  • Happening during the day. 

  • Pertaining to daytime; appropriate to the day. 

peep of day

noun

  • break of day; daybreak 

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