Usage patterns
頼みがあるto have a favor to ask
I have a small favor to ask, is that okay?
〈人〉を頼みにするto rely on someone
He relies on his older brother to get by.
頼みを聞くto grant someone's request
He granted his friend's request and lent him money.
頼みになるto be reliable/dependable
This tool becomes reliable in times of disaster.
〈人〉の頼みを断るto refuse someone's request
She refused her boss's request.
頼みを引き受けるto accept a favor/request
The teacher accepted the student's request.