We look at the division of 42436969 by 252 
The aim is to understand the frequency of 252 in 42436969.

Let's proceed to step 1:
252 goes into 4 0 times with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Include the next digit (2) from the dividend after 4, then repeat: 42 / 252

Going ahead to step 2:
252 can be fit into 42 0 times, resulting in a remainder of 42.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 42 after subtracting 0 from 42.
Fetch the next digit (4) from the dividend, attach it to 42 and continue: 424 / 252

Moving on to step 3:
252 goes into 424 1 times with a remainder of 172.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 172 after subtracting 252 from 424.
Bring next digit (3) of the dividend behind the 172 and repeat the process: 1723 / 252

Step 4:
When dividing 1723 by 252, we get 6 with a remainder of 211.
Use 6 as the next digit of our solution. 
Result so far: 16.0
Deduct 1512 from 1723 and we're left with 211.
Take the next digit (6) from the dividend and append it to 211, then repeat: 2116 / 252

Advancing to step 5:
252 goes into 2116 8 times with a remainder of 100.
Write down 8 as next digit of the result. 
Result so far: 168.0
Deduct 2016 from 2116 and we're left with 100.
Take the next digit (9) from the dividend and append it to 100, then repeat: 1009 / 252

Let's proceed to step 6:
When dividing 1009 by 252, we get 4 with a remainder of 1.
Put 4 as the next digit of the answer. 
Result so far: 1684.0
If we take 1008 away from 1009, we end up with 1.
Append the next digit (6) from the dividend to 1 and continue with: 16 / 252

Advancing to step 7:
252 can be fit into 16 0 times, resulting in a remainder of 16.
The next digit of our result is 0. 
Result so far: 16840.0
Deduct 0 from 16 and we're left with 16.
Append the next digit (9) from the dividend to 16 and continue with: 169 / 252

On to step 8:
When dividing 169 by 252, we get 0 with a remainder of 169.
The number 0 becomes the next digit in our result. 
Result so far: 168400.0
The remainder is 169 after subtracting 0 from 169.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1690, and continue the process.

On to step 9:
The number 252 fits into 1690 6 times, leaving a remainder of 178.
Write down 6 as next digit of the result. 
Result so far: 168400.6
Subtract 1512 from 1690 to get 178.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1780, and continue the process.

Let's proceed to step 10:
252 can be fit into 1780 7 times, resulting in a remainder of 16.
Write down 7 as next digit of the result. 
Result so far: 168400.67
Subtracting 1764 from 1780 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 11:
When dividing 160 by 252, we get 0 with a remainder of 160.
The number 0 becomes the next digit in our result. 
Result so far: 168400.67
The remainder is 160 after subtracting 0 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Step 12:
252 goes into 1600 6 times with a remainder of 88.
The number 6 becomes the next digit in our result. 
Result so far: 168400.6706
Deduct 1512 from 1600 and we're left with 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Let's proceed to step 13:
The number 252 fits into 880 3 times, leaving a remainder of 124.
Use 3 as the next digit of our solution. 
Result so far: 168400.67063
Subtracting 756 from 880 leaves us with 124.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

Moving on to step 14:
1240 divided by 252 is 4 with a remainder of 232.
Use 4 as the next digit of our solution. 
Result so far: 168400.670634
Deduct 1008 from 1240 and we're left with 232.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

Step 15:
If we divide 2320 by 252, we get 9 and a remainder of 52.
Record the quotient 9 as the next digit in the result. 
Result so far: 168400.6706349
Deduct 2268 from 2320 and we're left with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Step 16:
252 goes into 520 2 times with a remainder of 16.
The number 2 becomes the next digit in our result. 
Result so far: 168400.67063492
Subtract 504 from 520 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Our division results in 168400.67063492 with a remaining 1.6e-08.