Timing diagram and performance of Binary Counters
When speed matters, you won’t want to use 4xxx family high voltage logic and choose a family with a lower maximum  Vdd.
The reasons for this is that newer, much smaller channels, have lower breakdown voltage, lower capacitance, lower RdsOn like 50 ohms for 74HCxx vs ~300 to 3k ohms for 4xxx family (18V to 3V) which on the CMOS drivers work fine but slower.
In your case you want to consider the largest pulse width, &amp; recovery time and also derate for case temperatures above 25’C where they run slower due to higher RdsOn.