capitation vs impost

capitation

noun
  • A poll tax. 

  • Performing a headcount; the counting of people. 

  • A system of remuneration for providers of health care, in which providers enroll patients as permanent clients and receive a fixed periodic payment for each enrollee. 

  • A donation made to an educational institution to obtain admission. 

impost

noun
  • A tax, tariff or duty that is imposed, especially on merchandise. 

  • The weight that must be carried by a horse in a race, the handicap. 

  • The top part of a column, pillar, pier, wall, etc. that supports an arch. 

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