This is the 519th most frequent German word.
berliner
A "Berliner" in German can refer to either a person from Berlin or a type of jelly-filled doughnut.
In this sentence, 'Berliner' refers to an inhabitant of Berlin, the capital city of Germany.
Ich bin ein Berliner.
I am a Berliner.
Here, 'Berliner' refers to a jelly-filled doughnut popular in Germany.
Zum Frühstück esse ich gern einen Berliner.
For breakfast, I like to eat a Berliner.
In this context, 'Berliner Zeiten' refers to a time period associated with Berlin, meaning when the speaker used to live in or was associated with Berlin.