If average reward is 150 satoshis and you make the claim 20 times a day every day, it will take you 100 years with current conditions.
You have to take into account bitcoin valuation and with that decreased reward in terms of satoshis.
150 satoshi * 20 claims/day * 365 days * 100 years = 109500000 satoshi = 1.095 BTC
I don't blame the Op for asking this question and initially when we start we all are shown that facuets will help us earn Bitcoin, that's how they are marketed as. Well op that formula current you can get up to 120 satoshi's per hour and as and when Bitcoin price goes up boom satoshi's price down. Well but since you asked you can try out freebitco.in claim every hour, get some how 1000-10000 referrals and if they claim maybe In few years time, also they give you reward points to. Or buy your self one btc put it on freebitco.in and earn daily interest go to their site and see your earnings. Wise tip forget earnings Bitcoin via facuets, unless you have a crazy referral back up. Do look out here in games section to earn more satoshi's or services section to earn money Goodluck.