Learn English – urge + preposition

If you provide for [someone/something in need] without specifying exactly what, it means you make available to them whatever they need - often food (provisions/provender). You can also provide for [some eventuality] without specifying what, meaning you have plans/resources to deal with that eventuality should it come to pass. Both these usages have been around a long time, and always involve for, not to.

To provide [something] to [someone] is a far more recent usage...

Per @JeffSahol's answer, provide X to Y often implies that Y did actually receive X, whereas provide X for Y can be used even if Y doesn't avail himself of the X which is on offer. But often it's an idiomatic choice where people repeat the version they hear most. Other than that, the modern trend towards to clearly disambiguates from the first two usages given above.

The distinction isn't as great with the British spelling (enamoured) NGram using the British spelling of enamoured, which may be what prompted the OP's question.

I actually hear more people say "enamored by," which is incorrect. I think this is a funny and memorable explanation of the preposition to use with enamored:

Enamored By ( or ) Enamored Of:

If you’re crazy about ferrets, you’re enamored of them.

It is less common but still acceptable to say "enamored with."

But if you say you are enamored by ferrets, you’re saying that ferrets are crazy about you.