This is the ValueSet that contains all the codes in Recurrent caracteristic of the Schedule | Caractère récurrent du Schedule (https://hl7.fr/ig/fhir/core/ValueSet/fr-core-vs-availability-time-rule) and FR Core ValueSet Availability Schedule (https://hl7.fr/ig/fhir/core/ValueSet/fr-core-vs-availability-time-rule). E.g. what you have to deal with if you get resources containing codes in either of them