carnival vs fest

carnival

noun
  • A festive occasion marked by parades and sometimes special foods and other entertainment. 

  • Any of a number of festivals held just before the beginning of Lent. 

  • A traveling amusement park, called a funfair in British English. 

fest

noun
  • A gathering for a specified reason or occasion. 

  • An event in which the act denoted by the previous noun occurs. 

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