Times New Roman is less than 150 years old, Helvetica less than 100. Despite their ubiquity due to being the default fonts on personal computers, they aren't super common in publishing or signage. They're actually kind of special purpose typefaces. Times is specifically designed packing narrow columns, like newspapers, and Helvetica is for ... I dunno what, documentary filmmakers? (The documentary was great).
As another commenter has said, Garamond has been around for many more centuries.