Baader-Meinhof phenomenon

== English == === Etymology === Named in 1994 after the West German Baader-Meinhof Group of the 1970s, when a commentator unexpectedly heard two references to the group within 24 hours. The group is named after two of its leaders, Andreas Baader and Ulrike Meinhof. === Noun === Baader-Meinhof phenomenon (plural not attested) (psychology) A cognitive bias by which a recently learned word, concept, etc. suddenly seems to appear with improbable frequency. Synonyms: Baader-Meinhof effect, frequency illusion === Further reading === frequency illusion on Wikipedia.Wikipedia