studiosity
/ˌstjuːdɪˈɒsɪti/ /ˌstʃuːdɪˈɒsɪti/noun
The quality of being studious; studiousness.
Origin
Late Middle English; earliest use found in Book Gostlye Grace. From post-classical Latin studiosit-, studiositas from classical Latin studiōsus + -tās.