How often should I check in on my contractor during the rehab?

[James Bowerman]

I've just begun rehabbing my first flip. It's my first time working with this contractor. We have a good repertoire so far and there's no reason for me to not trust him. I work full time but the property is close to my home and work. My question is how often should I check in on the property to inspect the work and with the contractor to get updates, without becoming burdensome? Ultimately, I know it's my property and I'm at the most risk, so it's my responsibility to oversee the project. However, I don't want to make it seem like I don't trust him to do his job. Any advice from fellow rehabbers or general contractors would be appreciated.