Continuity With Meditation Practice

I have been practising compassion meditation somewhat consistently. I usually try to do so in the morning and in the evening. Somehow, I've come to view these two moments as 'ideal' in terms of meditation. But, when I skip a meditation session, I am afraid or unwilling to meditate outside of those morning and evening times. **Would it bring more benefit to just meditate whenever possible, independently of a routine schedule?** I feel like meditating during the day (other than morning or evening) will maybe affect my schedule, making my evening meditation 'too much'. **In sum, is it profitable to meditate outside of schedule (or even disregard schedule) to compensate for skipped sessions?**