Tremmel, 33, said: "I was thinking about leaving Swansea in the summer. I thought my chance would never come because Michel was doing so well.
"It's hard being on the bench. If you're not playing you can't be satisfied. You work hard but you don't get rewarded with a game at the weekend. My attitude is to train at 100 per cent - I expect myself to be a No 1 keeper.
"For it to end up as it is right now, I'm very pleased."