Need separate license for Rust code?

[sts10]

Currently, this project is licensed under Creative Commons 3.0 Unported. This is solely because that's how Google Ngram data is licensed. I did this because this project, obviously, contains lots of words that originally came from Google Ngram data.

However, this repo/project also contains non-trivial Rust code in it (about 180 lines of code). In my understanding, Creative Commons licenses aren't really made to cover code. For that reason, I think I should license the Rust code of this project under a different license, such as the MIT License or the Blue Oak Model License.

My questions are (1) Whether this is a good idea, and (2) how I might practically go about doing this. For example, should copies of both licenses be in the repo, and explain what work falls under which license in the README? What should I name the two license files?

I'm sure there are examples of this to follow?

[sts10]

I slept on this and decided to merge #2 . Still open to comments on this though!