The webapp provides for each item the link on ECB's website.
Speeches for : Isabel Schnabel where "gradual" appeared
2021-12-22 : Interview with Le Monde2021-12-08 : Monetary policy and financial stability
2021-11-29 : TV interview with ZDF Morgenmagazin
2021-09-20 : Asset purchases: from crisis to recovery
2021-07-03 : Escaping low inflation?