The French suffix -age is added to verbs or nouns to make new nouns, which are always masculine.
French has two words for each of the following: year, day, morning, and evening, and they cause no end of difficulties for non-native speakers. Why is it that English can get away with one word when French needs two? The answer lies in how you look at these temporal markers.
Approximate numbers are very useful for talking about generalities, making estimates, and just flat-out guessing. English only has one approximate number, content to use "about" in front of cardinal numbers any time a guess is required. In contrast, French has about a dozen approximate numbers.