I have set up google recaptcha to verify the token shared with the backend. So I’m using the site key in the frontend (react application) and the secret key in the dotnet backend to verify the token received

I’m developing my website using React.js and I want to use Google reCAPTCHA on the login page, how many assessments do I get for free?
The other question is, how can I see how many assessments I have remaining?