termDuration

This term is proposed for full integration into Schema.org, pending implementation feedback and adoption from applications and websites.

Thing > Property > termDuration

The amount of time in a term as defined by the institution. A term is a length of time where students take one or more classes. Semesters and quarters are common units for term.
Values expected to be one of these types
Duration
Used on these types
EducationalOccupationalProgram

Source

https://github.com/schemaorg/schemaorg/issues/2419