This is the 13331st most frequent Swedish word.
tågresa
Train journey.
In this sentence, 'tågresa' is used as a noun denoting a specific journey by train that the speaker is anticipating.
Jag ser fram emot min tågresa till Göteborg.
I'm looking forward to my train journey to Gothenburg.
Here, 'tågresa' refers to an ongoing train journey during which the described action (reading a book) takes place.
Under tågresan läste jag hela boken jag tog med.
During the train journey, I read the entire book I brought.
In this example, 'tågresor' is plural, indicating multiple train journeys, used as the subject of the discussion described.