How much time does it take to cross-synch Airbnb calendars

[Juliette11]

Dear fellow hosts,

I want to list the same space twice (1 listing for 1 bedroom and 1 listing for the complete appartment). I was wondering how fast the calendars between the listings synchronise. Is this a matter of seconds, minutes or hours? Knowing the time between every synchronising the calendars would help me to avoid receiving double bookings. 

Best regards, Juliette

[Nivaldo-and-Christina0]

I'm in the same situation.....any help ?