Repentance means a change of mind and doesn't the Bible tell us in Romans 12:1-3 that Christians are called for the renewing of one's mind? Since repentance in the Greek is metanoneia or a change of mind which begets a change in purpose, doesn't repentance of sin result to repentance from sin? This renewing of the mind is a daily part of the Christian walk. The mind of the Christian is not just renewed once but daily. This is daily repentance. Anybody who thinks repentance is just a one time affair and salvation from sin is just a one time affair needs to think. True salvation saved the person, saves the person and will save the person. True repentance of sin continues in repentance from one's sins. Submission to Christ's Lordship at the moment of salvation continues in further submission in the process of sanctification.
There's no reason for any true Christian to believe that true Christians don't grow in repentance. If they are having works meet for repentance then that repentance must be growing. If the Christian continues to do good wasn't it because that repentance is perfected? This has nothing to do with their individual efforts but the whole reality that Titus 2:11-14 says God's grace is greater than the sin of the believer. That truth is so comforting that the Christian can rejoice they have power against sin by the grace of God.