Help needed with Frequency Counter

Hi, I need to design a simple frequency counter to measure the frequency of a square wave input (hence signal conditioning is not needed for now). I have understood the concept that the counter needs to count the input pulses for 1 second and display them on a 7-segment. My problem is how am i going to use the latch function (LE) to keep showing the frequency that was counted.

This is what I came up with so far:


The input signal (in this case 50Hz) triggers the 1Hz monostable, hence counts for 1 second. The problem is that after that 1 second, the counter resets to zero and recounts to 49 in this case. I need to find a way to keep the counter on 49 rather than going back to zero. Later I will add a 10Hz and 100Hz monostable for decimal points but for now I need to understand this concept.

Thank you.