Matthew 18:21Then came Peter to him, and said, Lord, how oft shall my brother sin against me, and I forgive him? till seven times?
Matthew18:22 Jesus saith unto him, I say not unto thee, Until seven times: but, Until seventy times seven.
Peter was thinking you forgive 7x in a day, and Jesus
added for 70 years you forgive during the 7 prayer hours of the day and night "Watches"