Hpv high grade dyskaryosis

Hi does anyone know how long it takes for hpv to cause high grade dyskaryosis? I have been with the same partner for 3 years and tested positive for the above

Neither of us have been with anyone else so I’m confused

I have been with my husband 36 years and have high grade dyskaryosis.
I have 5 yearly smears and it just got found so who knows.
You can have it years until it rears it’s ugly head.

Thank you so much