Hello, thank you for reaching out to Microsoft Q&A.
May I please know which edition of Microsoft Office you purchased or have a license for? If you have a standalone license for Microsoft Word, please note that it is limited to use on only one PC.
If you would like to use Office applications on another device with a different Microsoft account, you will need a Microsoft 365 Family subscription, which allows you to share Office with up to five additional members (six users total).
Please go to https://account.microsoft.com/services, sign in with your Microsoft account, and check which edition of Microsoft Office you are licensed for, then share that information here.
You can unlink your account from the Microsoft Word application on her Mac, which will remove access to your synced files on her PC. And, there is no time limit or waiting period required for uninstalling and reinstalling the Office applications.