Examples of websites using
Helvetica
(Helvetica is a sans serif font designed by Max Miedinger, Linotype Design Studio, and released by Linotype in 1957. It is available in a wide range of styles and weights)
with
Times New Roman
('Times New Roman' is a serif font designed by Victor Lardent and Stanley Morison, and released by Monotype in 1932. It is available in a range of styles, including regular, bold, italic, and bold italic)