Looking on the internet deeply has found these results:

certificate is the most popular phrase on the web.

credential 116,300,000 results on the web	certificate 1686,000,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Which is why I need your credential. There's a known exploit in the authentication credential. Her credential might not be far off. I need a credential, something current, to sell my cover. I need a credential with more substance. Cruel as that may be, that is not in itself a credential. That's a credential, rewriting Einstein. EA, the European Commission, EFTA and the competent national authorities acknowledge that accreditation serves as a credential for bodies operating at the conformity assessment level and is therefore a means of building confidence for their users.	Your certificate in data management essentials. Mobile offshore drilling unit safety certificate. Delete as appropriate throughout the certificate. Special server certificate cannot be empty. Statements of expenditure shall be accompanied by an audit certificate. Transport of substances to be inhibited without valid inhibitor certificate. This is not a signer certificate. Health certificate NoORIGINAL (1)2.2.

credential

116,300,000 results on the web

certificate

1686,000,000 results on the web

More popular!

Which is why I need your credential.
There's a known exploit in the authentication credential.
Her credential might not be far off.
I need a credential, something current, to sell my cover.
I need a credential with more substance.
Cruel as that may be, that is not in itself a credential.
That's a credential, rewriting Einstein.
EA, the European Commission, EFTA and the competent national authorities acknowledge that accreditation serves as a credential for bodies operating at the conformity assessment level and is therefore a means of building confidence for their users.