academy vs secondary school

academy

noun
  • An institution for the study of higher learning; a college or a university; typically a private school. 

  • A society of learned people united for the advancement of the arts and sciences, and literature, or some particular art or science. 

  • Plato's philosophical system based on skepticism; Plato's followers. 

  • The garden where Plato taught. 

  • A school directly funded by central government, independent of local control. 

  • A body of established opinion in a particular field, regarded as authoritative. 

  • A school or place of training in which some special art is taught. 

  • Academia. 

secondary school

noun
  • School with education level between primary school and university. 

  • In the UK and Ireland, a state school attended between the ages of 11 and 16 or 18. 

  • The federally designated, graduation-separated classification of grades 9–12 (approximately ages 14–18), regardless of whether they are compiled together in one school or separate from the other grades. 

  • Middle school; junior high school; a school that one attends between the ages of 12-17 (equivalent of grades 7-10 in North America, and years 7-10 in Australia). 

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