IPA: /ˈklaɪəntɪdʒ/
KK: /ˈklaɪəntɪdʒ/
A group of clients or customers who use the services of a business or professional.
The lawyer's clientage grew significantly after the successful case.
Clientage → It is formed from "client" (from Latin "cliens", meaning a person under the protection of another) and "-age" (a suffix denoting a state or condition). The word "clientage" refers to the state or condition of being a client or the relationship between a client and a service provider.
Think of a 'client' being in a special 'state' or 'condition' of receiving services — that's what clientage means.