We look at the division of 5259161 by 452 
The aim is to understand the frequency of 452 in 5259161.

Let's proceed to step 1:
5 divided by 452 is 0 with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Take the next digit (2) from the dividend and append it to 5, then repeat: 52 / 452

Let's proceed to step 2:
When dividing 52 by 452, we get 0 with a remainder of 52.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 52 and we're left with 52.
Append the next digit (5) from the dividend to 52 and continue with: 525 / 452

On to step 3:
When dividing 525 by 452, we get 1 with a remainder of 73.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 452 from 525, we get 73.
Grab the next digit (9) from the dividend, add it to 73, then carry on: 739 / 452

Going ahead to step 4:
If we divide 739 by 452, we get 1 and a remainder of 287.
The next digit of our result is 1. 
Result so far: 11.0
If we take 452 away from 739, we end up with 287.
Include the next digit (1) from the dividend after 287, then repeat: 2871 / 452

On to step 5:
452 can be fit into 2871 6 times, resulting in a remainder of 159.
Record the quotient 6 as the next digit in the result. 
Result so far: 116.0
Subtract 2712 from 2871 to get 159.
Append the next digit (6) from the dividend to 159 and continue with: 1596 / 452

Moving on to step 6:
1596 divided by 452 is 3 with a remainder of 240.
The number 3 becomes the next digit in our result. 
Result so far: 1163.0
Deduct 1356 from 1596 and we're left with 240.
Fetch the next digit (1) from the dividend, attach it to 240 and continue: 2401 / 452

Moving on to step 7:
452 can be fit into 2401 5 times, resulting in a remainder of 141.
The number 5 becomes the next digit in our result. 
Result so far: 11635.0
Subtracting 2260 from 2401 leaves us with 141.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1410, and continue the process.

Going ahead to step 8:
452 can be fit into 1410 3 times, resulting in a remainder of 54.
The number 3 becomes the next digit in our result. 
Result so far: 11635.3
Subtract 1356 from 1410 to get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Advancing to step 9:
When dividing 540 by 452, we get 1 with a remainder of 88.
The number 1 becomes the next digit in our result. 
Result so far: 11635.31
Subtracting 452 from 540 leaves us 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.

Step 10:
452 can be fit into 880 1 times, resulting in a remainder of 428.
Use 1 as the next digit of our solution. 
Result so far: 11635.311
If we subtract 452 from 880, we get 428.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4280, and continue the process.

The final outcome is 11635.311, with a leftover of 0.0428.