The database manager was assuming that the blobs related to the term frequency all exclusively follow this format:

[
    "<term>","freq",
    {"reading":"<reading>",
       "frequency": {"value": <number>, "displayValue": "<stylized frequency string>"}
    }
]

However, the dictionary-term-meta-bank-v3-schema allows for multiple possible types for the value of the frequency key.

This pull request adds support for all possible types of frequency so that the pop-up can show frequency information for the highlighted term.