April vs October

April

name

  • A female given name from English; used since early 20th century. 

  • The fourth month of the Gregorian calendar, following March and preceding May. Abbreviation: Apr or Apr. 

  • A surname. 

October

name

  • A female given name from English. 

  • The tenth month of the Gregorian calendar, following September and preceding November. Abbreviation: Oct. 

verb

  • In the early Soviet Union, to give a child a name tinged with Soviet revolutionary thought, as opposed to religious christening. 

noun

  • A type of ale traditionally brewed in October. 

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