'Oft' in the Bible

Then came to him the disciples of John, saying, Why do we and the Pharisees fast oft, but thy disciples fast not?

Lord, have mercy on my son: for he is lunatick, and sore vexed: for ofttimes he falleth into the fire, and oft into the water.

Then came Peter to him, and said, Lord, how oft shall my brother sin against me, and I forgive him? till seven times?