There are 14 Journeys in one series. It takes two years to complete all 14 Journeys.
A note on how the Journeys are numbered (cataloged) on this site:
The first number will always be the Cycle. There are 26 cycles planned, so the first number will be a number from 1-26. The second number is the Journey. There are 14 Journeys in each cycle, so the second number will always be from 1-14. The third number will always be the Day of the Journey. There are 43 days of writing. The first two days are 0 and 00, the days are 1-40, and the afterword is day 41.
We are currently on Cycle 2, Journey 8: 2.8.(1-41)
Here is the schedule through 2020: