A viral post on Facebook about the “slow cashier” provides this example of a common error made by many. Two errors, in fact, in one paragraph:
He also said that she has enough leaves that could be availed (and get paid for sitting at home) but Premlata chose to come to work because she wanted to retire with dignity.
It is never plural, in the context of leave from work. You have “enough leave”
You always “avail of” something. The second word is required.