We look at the division of 53463945 by 641 
The aim is to understand the frequency of 641 in 53463945.

On to step 1:
The number 641 fits into 5 0 times, leaving a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Include the next digit (3) from the dividend after 5, then repeat: 53 / 641

Step 2:
641 can be fit into 53 0 times, resulting in a remainder of 53.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 53 leaves us with 53.
Fetch the next digit (4) from the dividend, attach it to 53 and continue: 534 / 641

Let's proceed to step 3:
If we divide 534 by 641, we get 0 and a remainder of 534.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 534 leaves us with 534.
Append the next digit (6) from the dividend to 534 and continue with: 5346 / 641

Advancing to step 4:
The number 641 fits into 5346 8 times, leaving a remainder of 218.
Write down 8 as next digit of the result. 
Result so far: 8.0
Subtract 5128 from 5346 to get 218.
Include the next digit (3) from the dividend after 218, then repeat: 2183 / 641

Step 5:
2183 divided by 641 is 3 with a remainder of 260.
Use 3 as the next digit of our solution. 
Result so far: 83.0
Subtracting 1923 from 2183 leaves us with 260.
Grab the next digit (9) from the dividend, add it to 260, then carry on: 2609 / 641

On to step 6:
641 goes into 2609 4 times with a remainder of 45.
Put 4 as the next digit of the answer. 
Result so far: 834.0
If we subtract 2564 from 2609, we get 45.
Include the next digit (4) from the dividend after 45, then repeat: 454 / 641

Advancing to step 7:
454 divided by 641 is 0 with a remainder of 454.
Use 0 as the next digit of our solution. 
Result so far: 8340.0
If we take 0 away from 454, we end up with 454.
Append the next digit (5) from the dividend to 454 and continue with: 4545 / 641

On to step 8:
If we divide 4545 by 641, we get 7 and a remainder of 58.
Write down 7 as next digit of the result. 
Result so far: 83407.0
Subtract 4487 from 4545 to get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Step 9:
641 can be fit into 580 0 times, resulting in a remainder of 580.
The number 0 becomes the next digit in our result. 
Result so far: 83407.0
Deduct 0 from 580 and we're left with 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5800, and continue the process.

Let's proceed to step 10:
If we divide 5800 by 641, we get 9 and a remainder of 31.
Record the quotient 9 as the next digit in the result. 
Result so far: 83407.09
The remainder is 31 after subtracting 5769 from 5800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Let's proceed to step 11:
When dividing 310 by 641, we get 0 with a remainder of 310.
The next digit of our result is 0. 
Result so far: 83407.09
Deduct 0 from 310 and we're left with 310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3100, and continue the process.

Going ahead to step 12:
641 can be fit into 3100 4 times, resulting in a remainder of 536.
The number 4 becomes the next digit in our result. 
Result so far: 83407.0904
Subtract 2564 from 3100 to get 536.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5360, and continue the process.

Moving on to step 13:
5360 divided by 641 is 8 with a remainder of 232.
Record the quotient 8 as the next digit in the result. 
Result so far: 83407.09048
The remainder is 232 after subtracting 5128 from 5360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

Step 14:
When dividing 2320 by 641, we get 3 with a remainder of 397.
Write down 3 as next digit of the result. 
Result so far: 83407.090483
If we take 1923 away from 2320, we end up with 397.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3970, and continue the process.

Step 15:
The number 641 fits into 3970 6 times, leaving a remainder of 124.
Write down 6 as next digit of the result. 
Result so far: 83407.0904836
If we subtract 3846 from 3970, we get 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 16:
When dividing 1240 by 641, we get 1 with a remainder of 599.
The next digit of our result is 1. 
Result so far: 83407.09048361
Subtract 641 from 1240 to get 599.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5990, and continue the process.

Our division results in 83407.09048361 with a remaining 5.99e-07.