There are 2 parts to our requirement:

1. To find slots based on time interval i.e. getting slots only between 12PM-2PM on each day for example.
2. To find slots on specific days i.e. getting slots only on Wednesdays.

Currently we are using msdyn_SearchResourceAvailabilityForRequirementGroup API to find slots within our application. Based on our analysis, there are no options to pass in parameters to filter slots based on our requirement mentioned above. 

It would be better if there are parameters that the API can accept to find slots based on the criteria above.