In the ERPNext Documentation it says there is a field type “Duration” (at the very bottom of the page)
https://docs.erpnext.com/docs/user/manual/en/customize-erpnext/articles/field-types.html
I am currently on
ERPNext: v12.8.0 (version-12)
Frappe Framework: v12.5.2 (version-12)
but I am unable to find the duration field type in my DocTypes
Any suggestions?