guardianship vs wardship

guardianship

noun
  • The office or position of one acting as a guardian or conservator, especially in a legal capacity. 

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 guardianship and wardship occurred in a corpus of books? (source: Google Ngram Viewer )