90933597 divided by 641 
The aim is to understand the frequency of 641 in 90933597.

Advancing to step 1:
641 goes into 9 0 times with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Include the next digit (0) from the dividend after 9, then repeat: 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
Subtract 0 from 90 to get 90.
Append the next digit (9) from the dividend to 90 and continue with: 909 / 641

Let's proceed to step 3:
641 can be fit into 909 1 times, resulting in a remainder of 268.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 268 after subtracting 641 from 909.
Fetch the next digit (3) from the dividend, attach it to 268 and continue: 2683 / 641

Step 4:
641 can be fit into 2683 4 times, resulting in a remainder of 119.
The number 4 becomes the next digit in our result. 
Result so far: 14.0
Deduct 2564 from 2683 and we're left with 119.
Take the next digit (3) from the dividend and append it to 119, then repeat: 1193 / 641

Moving on to step 5:
If we divide 1193 by 641, we get 1 and a remainder of 552.
Use 1 as the next digit of our solution. 
Result so far: 141.0
If we take 641 away from 1193, we end up with 552.
Append the next digit (5) from the dividend to 552 and continue with: 5525 / 641

Going ahead to step 6:
5525 divided by 641 is 8 with a remainder of 397.
Record the quotient 8 as the next digit in the result. 
Result so far: 1418.0
Subtracting 5128 from 5525 leaves us with 397.
Grab the next digit (9) from the dividend, add it to 397, then carry on: 3979 / 641

On to step 7:
641 can be fit into 3979 6 times, resulting in a remainder of 133.
Write down 6 as next digit of the result. 
Result so far: 14186.0
The remainder is 133 after subtracting 3846 from 3979.
Take the next digit (7) from the dividend and append it to 133, then repeat: 1337 / 641

Advancing to step 8:
When dividing 1337 by 641, we get 2 with a remainder of 55.
Write down 2 as next digit of the result. 
Result so far: 141862.0
If we subtract 1282 from 1337, we get 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Let's proceed to step 9:
When dividing 550 by 641, we get 0 with a remainder of 550.
Write down 0 as next digit of the result. 
Result so far: 141862.0
Subtract 0 from 550 to get 550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5500, and continue the process.

On to step 10:
5500 divided by 641 is 8 with a remainder of 372.
Put 8 as the next digit of the answer. 
Result so far: 141862.08
If we subtract 5128 from 5500, we get 372.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3720, and continue the process.

On to step 11:
The number 641 fits into 3720 5 times, leaving a remainder of 515.
The next digit of our result is 5. 
Result so far: 141862.085
Deduct 3205 from 3720 and we're left with 515.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5150, and continue the process.

Going ahead to step 12:
641 goes into 5150 8 times with a remainder of 22.
Write down 8 as next digit of the result. 
Result so far: 141862.0858
Subtract 5128 from 5150 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Let's proceed to step 13:
220 divided by 641 is 0 with a remainder of 220.
The number 0 becomes the next digit in our result. 
Result so far: 141862.0858
Subtracting 0 from 220 leaves us with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Step 14:
When dividing 2200 by 641, we get 3 with a remainder of 277.
Record the quotient 3 as the next digit in the result. 
Result so far: 141862.085803
Subtract 1923 from 2200 to get 277.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2770, and continue the process.

Let's proceed to step 15:
The number 641 fits into 2770 4 times, leaving a remainder of 206.
Use 4 as the next digit of our solution. 
Result so far: 141862.0858034
If we subtract 2564 from 2770, we get 206.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2060, and continue the process.

Going ahead to step 16:
The number 641 fits into 2060 3 times, leaving a remainder of 137.
Use 3 as the next digit of our solution. 
Result so far: 141862.08580343
If we take 1923 away from 2060, we end up with 137.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1370, and continue the process.

The final outcome is 141862.08580343, with a leftover of 1.37e-07.