During an internship, interns  spend anywhere from a day to a few weeks getting exposure to work where the stint (usually in the form of job shadowing) is short, unpaid, and informal. The word externship comes from the combination of "experience" and "internship". Micro-internships are similarly short-termed but paid assignments. broadly defined as a job training stint that is typically much shorter in duration (e.g. 1 to 6 weeks) as compared to an internship (e.g. 2 months or more).