[icebraining]

I doubt there's a single dataset containing tourist occupation across the world, but you can probably find it city by city, although often only in the original language.

For example, there's a report on the rate of occupation of hotels per fortnight in Barcelona, but it's a PDF and it's not even in Spanish (Castellano), but in Catalan, the regional language: https://www.diba.cat/documents/74348/115651101/Informe+Flaix...