parenting vs wardship

parenting

noun
  • The process of raising and educating a child from birth until adulthood. 

wardship

noun
  • The state of being a ward of someone. 

  • In English feudal law, the guardianship which the lord had of the land of his vassal while the latter was an infant or minor. 

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