adeptship
/ˈadɛp(t)ʃɪp/ /əˈdɛp(t)ʃɪp/noun
The condition or status of an adept, especially an expert in magical or occult practices; the fact of being very skilled or proficient at something.
Origin
Early 19th century; earliest use found in Samuel Taylor Coleridge (1772–1834), poet, critic, and philosopher. From adept + -ship.