kin vs little brother

kin

noun
  • One or more relatives, such as siblings or cousins, taken collectively. 

  • Relationship; same-bloodedness or affinity; near connection or alliance, as of those having common descent. 

  • Race; family; breed; kind. 

  • Persons of the same race or family; kindred. 

  • A fictional character who one deeply relates to. 

  • Someone who relates deeply to a certain fictional character. 

verb
  • To identify with; as in empathize or emotionally relate to a fictional character. 

adj
  • Related by blood or marriage, akin. Generally used in "kin to". 

little brother

noun
  • Coordinate terms: little sister, big brother, big sister 

  • younger brother. 

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