Re: Вот такой ответ дает Гугл
Для "вторая мировая война":
http://ngrams.googlelabs.com/graph?content=%D0%B2%D1%82%D0%BE%D1%80%D0%B0%D1%8F+%D0%BC%D0%B8%D1%80%D0%BE%D0%B2%D0%B0%D1%8F+%D0%B2%D0%BE%D0%B9%D0%BD%D0%B0&year_start=1900&year_end=2000&corpus=12&smoothing=3
Для "second world war":
http://ngrams.googlelabs.com/graph?content=second+world+war&year_start=1900&year_end=2000&corpus=0&smoothing=3
