guardianship vs management

guardianship

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

management

noun
  • The executives of an organisation, especially senior executives. 

  • Administration; the use of limited resources combined with forecasting, planning, leadership and execution skills to achieve predetermined specific goals. 

  • Judicious use of means to accomplish an end. 

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