This is the 6152nd most frequent Turkish word.
yıllardan
"Yıllardan" means "of the years" or "from the years" in English, often used to refer to a specific year or time period.
Here, 'yıllardan' is used within a time expression to signify a period lasting years.
Yıllardan beri seni görmedim.
I haven't seen you for years.
In this sentence, 'yıllardan' marks an elapsed period of time prior to something.
Yıllardan sonra tekrar memleketime döndüm.
After years, I returned to my hometown.
Here, 'yıllardan' refers to selecting one item from a set (the years).