Original sentence: Partly because the term institute holds some ambiguity of its own and can denote either educational extreme, from a pure research institution to an unrecognised educational institution, both schools would later change their names to use college instead of collegiate institute (in 1850 and 1918, respectively) to more accurately represent their nature and mission, in step with the trend that the term "collegiate institute" would see little use beyond the early 20th century
Edited sentence: Partly because the term institute holds some ambiguity of its own and can denote either educational extreme, from a pure research institution to an unrecognised educational institution, both schools would later change their names to use college instead of collegiate institute (in 1850 and 1918, respectively, each after less than 20 years since its founding) to more accurately represent their nature and mission, in step with the trend that the term "collegiate institute" would see little use beyond the early 20th century