Where and How to check dividend history of a stock?

hello guys

was looking at a few dividend stocks om the NYSE and LSE.

Just wondering how i can check the dividend history of the stocks?

do they always pay out the same ratio of earnings, like 50%?

or same quantity of money, like 1 dollar per share every year?

or my big fear do they pay out as a percentage of their stock price, like 5%? as worried if that the case and stock price halves, means the dividends will half too.

Where and how do you guys check something like this?

Is there more i should look at when checking for a dividend stock?

As goal is to buy enough to get $5000 a year in dividends stably.

thanks