How do you say time in french?

multiplied by: Two times four is eight. (deux fois quatre font huit)

I told him three times (je lui ai dit trois fois)

times (period) were hard : l'époque était dure, les temps étaient durs

the hour (as in what time is it?): l'heure - quelle heure est-il ?

Note that there are as many variations in French for 'times', as exist in English, so the context may be of importance.