Wrong use of the indefinite article before work, etc

Wrong use of the indefinite article before work, etc

Don’t Say:
Gillian has found a work at the bank.

Say:
Gillian has found work at the bank.
https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcS6KAbCbaDZ-407lMyK5NqM00wuEQVcrVpoa7BXIPVhGRf7Jo4y
Note:
Don’t use the indefinite artide before such words as work, fun, health, permission.