teacherage
/ˈtɛtʃərɪdʒ/Definitions
1. noun
The period of time during which someone is a teacher.
“She spent 25 years in the teaching profession, a significant part of her teacherage.”
2. noun
A teacher in a school or college, especially one who has taught for a long time.
“The venerable teacherage of the institution had been a pillar of the community for decades.”