You need to have your own (free) account to use the Corpus of Founding Era American English (COFEA) and other corpus linguistic resources maintained by Brigham Young Law School.

Create an account by selecting “Login” at the top right of the following webpage:
https://lawcorpus.byu.edu/

You will need either a gmail address or a Google account to create an account with COFEA

To create a Google account: