numberOfCredits

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

Thing > Property > numberOfCredits

The number of credits or units awarded by a Course or required to complete an EducationalOccupationalProgram.
Values expected to be one of these types
Integer
StructuredValue
Used on these types
Course
EducationalOccupationalProgram

Source

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