Gazette
Explore 3 million newspapers by title. Type in words such as “jeune”, “révolution”, “république”, “matin”, “soir”, “humanité”, “nouvelle”, “moderne”, “femme”, “paysan”, “ouvrier”, “social”, “résistance” etc. to see different historical trends.
I called this page “Gazette” because I was surprised that most of the corpus in the earlier years had a title containing this word. The query uses a case-insensitive REGEXP_MATCHES operator to count occurrences; you can query for example “socialis[tm]e” to match both “socialiste” and “socialisme”.