This is the 1115th most frequent Swedish word.
vana
Habit.
In this sentence, 'vana' refers to a regular practice or habit that the subject, Hon (she), consistently does.
Hon har en vana att läsa innan hon somnar.
She has a habit of reading before she falls asleep.
Here, 'vana' conveys the idea of a beneficial routine or behavior recommended to adopt.
Det är en god vana att dricka vatten varje morgon.
Drinking water every morning is a good habit.
In this usage, 'vana' denotes experience or proficiency gained over time in a particular activity.