Support searching for multiple frequencies

[RondeauG]

Addressing a Problem?

The current implementation of xs.search_data_catalogs only supports a single frequency per variable. It's not possible, for example, to find simulations that have pr: 3H and pr: D.

Potential Solution

variables_and_freqs should support a list of strings for a given variable, for example:
xs.search_data_catalogs(variables_and_freqs={"pr": ['3H', 'D']})

Additional context

No response

Contribution

• I would be willing/able to open a Pull Request to contribute this feature.