nursing home vs san

nursing home

noun
  • A place of residence for people who require constant nursing care and have significant deficiencies with activities of daily living, such as the elderly and younger adults with physical disabilities. 

san

noun
  • A letter of the Archaic Greek alphabet (uppercase Ϻ, lowercase ϻ) that came after pi and before qoppa. 

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