We look at the division of 52050455 by 641 
The aim is to understand the frequency of 641 in 52050455.

Advancing to step 1:
641 goes into 5 0 times with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Append the next digit (2) from the dividend to 5 and continue with: 52 / 641

Moving on to step 2:
When dividing 52 by 641, we get 0 with a remainder of 52.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 52 and we're left with 52.
Bring next digit (0) of the dividend behind the 52 and repeat the process: 520 / 641

Step 3:
641 goes into 520 0 times with a remainder of 520.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 520 leaves us with 520.
Append the next digit (5) from the dividend to 520 and continue with: 5205 / 641

Step 4:
If we divide 5205 by 641, we get 8 and a remainder of 77.
Put 8 as the next digit of the answer. 
Result so far: 8.0
If we subtract 5128 from 5205, we get 77.
Append the next digit (0) from the dividend to 77 and continue with: 770 / 641

Going ahead to step 5:
770 divided by 641 is 1 with a remainder of 129.
Record the quotient 1 as the next digit in the result. 
Result so far: 81.0
Subtracting 641 from 770 leaves us with 129.
Bring next digit (4) of the dividend behind the 129 and repeat the process: 1294 / 641

Step 6:
641 can be fit into 1294 2 times, resulting in a remainder of 12.
Use 2 as the next digit of our solution. 
Result so far: 812.0
If we subtract 1282 from 1294, we get 12.
Append the next digit (5) from the dividend to 12 and continue with: 125 / 641

Let's proceed to step 7:
If we divide 125 by 641, we get 0 and a remainder of 125.
The next digit of our result is 0. 
Result so far: 8120.0
If we subtract 0 from 125, we get 125.
Include the next digit (5) from the dividend after 125, then repeat: 1255 / 641

Going ahead to step 8:
1255 divided by 641 is 1 with a remainder of 614.
Put 1 as the next digit of the answer. 
Result so far: 81201.0
Subtract 641 from 1255 to get 614.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6140, and continue the process.

Advancing to step 9:
641 can be fit into 6140 9 times, resulting in a remainder of 371.
Write down 9 as next digit of the result. 
Result so far: 81201.9
Deduct 5769 from 6140 and we're left with 371.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3710, and continue the process.

Step 10:
When dividing 3710 by 641, we get 5 with a remainder of 505.
Put 5 as the next digit of the answer. 
Result so far: 81201.95
Subtracting 3205 from 3710 leaves us with 505.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5050, and continue the process.

Advancing to step 11:
5050 divided by 641 is 7 with a remainder of 563.
Write down 7 as next digit of the result. 
Result so far: 81201.957
Subtracting 4487 from 5050 leaves us with 563.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5630, and continue the process.

Going ahead to step 12:
641 can be fit into 5630 8 times, resulting in a remainder of 502.
Write down 8 as next digit of the result. 
Result so far: 81201.9578
If we take 5128 away from 5630, we end up with 502.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5020, and continue the process.

Going ahead to step 13:
641 goes into 5020 7 times with a remainder of 533.
Write down 7 as next digit of the result. 
Result so far: 81201.95787
If we subtract 4487 from 5020, we get 533.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5330, and continue the process.

On to step 14:
641 goes into 5330 8 times with a remainder of 202.
Write down 8 as next digit of the result. 
Result so far: 81201.957878
If we take 5128 away from 5330, we end up with 202.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2020, and continue the process.

Moving on to step 15:
If we divide 2020 by 641, we get 3 and a remainder of 97.
Record the quotient 3 as the next digit in the result. 
Result so far: 81201.9578783
Subtracting 1923 from 2020 leaves us with 97.
Since there are no more digits in the dividend, we add a zero to the remainder making it 970, and continue the process.

Moving on to step 16:
641 can be fit into 970 1 times, resulting in a remainder of 329.
The next digit of our result is 1. 
Result so far: 81201.95787831
The remainder is 329 after subtracting 641 from 970.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3290, and continue the process.

The final outcome is 81201.95787831, with a leftover of 3.29e-07.