We look at the division of 18606807 by 252 
The aim is to understand the frequency of 252 in 18606807.

On to step 1:
The number 252 fits into 1 0 times, leaving a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Fetch the next digit (8) from the dividend, attach it to 1 and continue: 18 / 252

Let's proceed to step 2:
252 goes into 18 0 times with a remainder of 18.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 18 after subtracting 0 from 18.
Bring next digit (6) of the dividend behind the 18 and repeat the process: 186 / 252

On to step 3:
The number 252 fits into 186 0 times, leaving a remainder of 186.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 186 leaves us with 186.
Append the next digit (0) from the dividend to 186 and continue with: 1860 / 252

On to step 4:
252 goes into 1860 7 times with a remainder of 96.
Use 7 as the next digit of our solution. 
Result so far: 7.0
If we take 1764 away from 1860, we end up with 96.
Grab the next digit (6) from the dividend, add it to 96, then carry on: 966 / 252

Step 5:
When dividing 966 by 252, we get 3 with a remainder of 210.
Write down 3 as next digit of the result. 
Result so far: 73.0
If we subtract 756 from 966, we get 210.
Grab the next digit (8) from the dividend, add it to 210, then carry on: 2108 / 252

On to step 6:
252 can be fit into 2108 8 times, resulting in a remainder of 92.
Record the quotient 8 as the next digit in the result. 
Result so far: 738.0
If we subtract 2016 from 2108, we get 92.
Include the next digit (0) from the dividend after 92, then repeat: 920 / 252

On to step 7:
920 divided by 252 is 3 with a remainder of 164.
The number 3 becomes the next digit in our result. 
Result so far: 7383.0
If we subtract 756 from 920, we get 164.
Append the next digit (7) from the dividend to 164 and continue with: 1647 / 252

Moving on to step 8:
1647 divided by 252 is 6 with a remainder of 135.
The next digit of our result is 6. 
Result so far: 73836.0
Deduct 1512 from 1647 and we're left with 135.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1350, and continue the process.

Let's proceed to step 9:
1350 divided by 252 is 5 with a remainder of 90.
Record the quotient 5 as the next digit in the result. 
Result so far: 73836.5
If we subtract 1260 from 1350, we get 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Going ahead to step 10:
When dividing 900 by 252, we get 3 with a remainder of 144.
Put 3 as the next digit of the answer. 
Result so far: 73836.53
If we subtract 756 from 900, we get 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

Advancing to step 11:
1440 divided by 252 is 5 with a remainder of 180.
Use 5 as the next digit of our solution. 
Result so far: 73836.535
If we take 1260 away from 1440, we end up with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Moving on to step 12:
252 can be fit into 1800 7 times, resulting in a remainder of 36.
Use 7 as the next digit of our solution. 
Result so far: 73836.5357
If we take 1764 away from 1800, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Going ahead to step 13:
252 goes into 360 1 times with a remainder of 108.
Use 1 as the next digit of our solution. 
Result so far: 73836.53571
Deduct 252 from 360 and we're left with 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

Moving on to step 14:
When dividing 1080 by 252, we get 4 with a remainder of 72.
The next digit of our result is 4. 
Result so far: 73836.535714
If we subtract 1008 from 1080, we get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Advancing to step 15:
252 goes into 720 2 times with a remainder of 216.
Record the quotient 2 as the next digit in the result. 
Result so far: 73836.5357142
Subtract 504 from 720 to get 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

Step 16:
The number 252 fits into 2160 8 times, leaving a remainder of 144.
Put 8 as the next digit of the answer. 
Result so far: 73836.53571428
Subtract 2016 from 2160 to get 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

The final result is 73836.53571428 with a remainder of 1.44e-07.