cake walk vs struggle

cake walk

noun
  • A type of dance originating in the United States in the 19th century. 

  • From the mid 1900s, a game at a fair or party in which people walk around a numbered circle along to music. When the music is stopped, the caller draws a number from a jar and whoever is standing on or closest to that number wins a cake. 

  • Something extremely easy. 

struggle

noun
  • A contortion of the body in an attempt to escape or to perform a difficult task. 

  • Strife, contention, great effort. 

verb
  • To strive, to labour in difficulty, to fight (for or against), to contend. 

  • To strive, or to make efforts, with a twisting, or with contortions of the body. 

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