From experience, it takes 2.5 hours to recharge Sony wireless headphones (MDR-XB70BT) from empty to full. This is also stated in the manual. The Sonys give 9 hours of battery life for listening. At 3 hours per day of usage, that’s 3 days between charges.
It takes 1.25 hours to recharge the Apple AirPods battery case. They give 24 hours of battery life when new. At 3 hours of usage per day, that’s 8 days between charges of the battery case.
Like all battery-driven headphones, you need to charge more often as the battery ages. After ~1 year of usage, I’ve found I need to recharge the AirPods battery case every 4 days, instead of every 8.
As an aside, I got the AirPods with wireless charging case, and don’t really like the wireless aspect of it. It’s too hard to position the AirPods perfectly on most wireless chargers. Next time, I’ll get the non-wireless AirPods.