The Cuban numbers station V2a is a reasonably reliable numbers station to follow with "pseudoschedules" like this one. Although I can give no total assurance that the station will appear on a given frequency at a given time, but most of the time they will appear there. Sometimes they may not transmit on a frequency, other times there can be strange transmitter faults or mixing of V2a and M8a or two V2a's on the same frequency. The reason for this is not known. This schedule was compiled using other listeners loggings and articles
I will add frequencies and times in the near future as I confirm them myself.
All times UTC. Rememmber, if you are new to UTC is that after 0000z starts a new day, so if you are listening for a transmission on let's say Monday at 0300z, you have to listen at Sunday (local time) at 0300z.