Kentucky DUI law and penalties:
transportation.ky.gov

License Suspension for Refusal to Take Alcohol or Subsequent Tests
It should be noted that all of the offenses listed below are for refusals within a five year period.
1st Offense 30 to 120 Days
2nd Offense 12 to 18 Months
3rd Offense 24 to 36 Months
4th Offense or subsequent-60 Months