You can check if someone(to whomever you want to schedule a meet) free or busy when adding them to an event.

• On your browser, open Google Calendar.
• On the left, click Search for people.
• Start typing someone’s name and choose the person(can also be multiple) you want to meet with.
• At the top left, click Create Add +.
• Click Suggested times and you'll see when they can attend.
• Enter the Title of the event/meet and add the guest if you want.
• Save it now and find the created event in the Calendar.