90645582 divided by 641 
The aim is to understand the frequency of 641 in 90645582.

On to step 1:
641 can be fit into 9 0 times, resulting in a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Bring next digit (0) of the dividend behind the 9 and repeat the process: 90 / 641

Going ahead to step 2:
The number 641 fits into 90 0 times, leaving a remainder of 90.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 90 and we're left with 90.
Bring next digit (6) of the dividend behind the 90 and repeat the process: 906 / 641

Advancing to step 3:
The number 641 fits into 906 1 times, leaving a remainder of 265.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 641 from 906 and we're left with 265.
Take the next digit (4) from the dividend and append it to 265, then repeat: 2654 / 641

Going ahead to step 4:
When dividing 2654 by 641, we get 4 with a remainder of 90.
The number 4 becomes the next digit in our result. 
Result so far: 14.0
Subtracting 2564 from 2654 leaves us with 90.
Take the next digit (5) from the dividend and append it to 90, then repeat: 905 / 641

Let's proceed to step 5:
641 can be fit into 905 1 times, resulting in a remainder of 264.
Put 1 as the next digit of the answer. 
Result so far: 141.0
If we take 641 away from 905, we end up with 264.
Take the next digit (5) from the dividend and append it to 264, then repeat: 2645 / 641

Let's proceed to step 6:
When dividing 2645 by 641, we get 4 with a remainder of 81.
The number 4 becomes the next digit in our result. 
Result so far: 1414.0
If we subtract 2564 from 2645, we get 81.
Bring next digit (8) of the dividend behind the 81 and repeat the process: 818 / 641

On to step 7:
When dividing 818 by 641, we get 1 with a remainder of 177.
Record the quotient 1 as the next digit in the result. 
Result so far: 14141.0
Subtracting 641 from 818 leaves us with 177.
Fetch the next digit (2) from the dividend, attach it to 177 and continue: 1772 / 641

Step 8:
If we divide 1772 by 641, we get 2 and a remainder of 490.
Use 2 as the next digit of our solution. 
Result so far: 141412.0
Subtract 1282 from 1772 to get 490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4900, and continue the process.

Going ahead to step 9:
4900 divided by 641 is 7 with a remainder of 413.
The next digit of our result is 7. 
Result so far: 141412.7
If we subtract 4487 from 4900, we get 413.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4130, and continue the process.

Step 10:
641 goes into 4130 6 times with a remainder of 284.
Record the quotient 6 as the next digit in the result. 
Result so far: 141412.76
If we take 3846 away from 4130, we end up with 284.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2840, and continue the process.

Advancing to step 11:
2840 divided by 641 is 4 with a remainder of 276.
The number 4 becomes the next digit in our result. 
Result so far: 141412.764
The remainder is 276 after subtracting 2564 from 2840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2760, and continue the process.

Step 12:
641 can be fit into 2760 4 times, resulting in a remainder of 196.
Write down 4 as next digit of the result. 
Result so far: 141412.7644
If we take 2564 away from 2760, we end up with 196.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1960, and continue the process.

Our division results in 141412.7644 with a remaining 0.00196.