What term refers to a series of related jobs or occupations pursued over a number of years?

The term that refers to a series of related jobs or occupations pursued over a number of years is "career." A career encompasses not just a single position but a continuing progression of employment within a specific field or industry that reflects a person’s skills, interests, and professional growth. It highlights the idea of long-term development and accumulation of experience rather than just short-term roles or shifts.

In contrast, a profession typically refers to a specific type of work that often requires formal education and training, but it doesn't inherently capture the broader trajectory that a career implies. Vocation tends to have a more personal connotation, often linked to one's calling or purpose in life, which may or may not translate into a sequence of jobs. Job history, on the other hand, focuses primarily on the record of a person's past employment, without the overarching narrative or direction implied by the term career. Thus, “career” is the most suitable choice for representing a sustained and evolving professional journey.