We divide 90981253 by 680
The aim is to understand the frequency of 680 in 90981253.

Let's proceed to step 1:
When dividing 9 by 680, we get 0 with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Take the next digit (0) from the dividend and append it to 9, then repeat: 90 / 680

Let's proceed to step 2:
If we divide 90 by 680, we get 0 and a remainder of 90.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 90, we get 90.
Fetch the next digit (9) from the dividend, attach it to 90 and continue: 909 / 680

Step 3:
When dividing 909 by 680, we get 1 with a remainder of 229.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 680 from 909 and we're left with 229.
Take the next digit (8) from the dividend and append it to 229, then repeat: 2298 / 680

On to step 4:
If we divide 2298 by 680, we get 3 and a remainder of 258.
Record the quotient 3 as the next digit in the result. 
Result so far: 13.0
Subtract 2040 from 2298 to get 258.
Take the next digit (1) from the dividend and append it to 258, then repeat: 2581 / 680

Advancing to step 5:
680 can be fit into 2581 3 times, resulting in a remainder of 541.
The next digit of our result is 3. 
Result so far: 133.0
Subtract 2040 from 2581 to get 541.
Append the next digit (2) from the dividend to 541 and continue with: 5412 / 680

Moving on to step 6:
5412 divided by 680 is 7 with a remainder of 652.
Put 7 as the next digit of the answer. 
Result so far: 1337.0
The remainder is 652 after subtracting 4760 from 5412.
Include the next digit (5) from the dividend after 652, then repeat: 6525 / 680

Let's proceed to step 7:
If we divide 6525 by 680, we get 9 and a remainder of 405.
Record the quotient 9 as the next digit in the result. 
Result so far: 13379.0
Subtract 6120 from 6525 to get 405.
Grab the next digit (3) from the dividend, add it to 405, then carry on: 4053 / 680

Advancing to step 8:
680 goes into 4053 5 times with a remainder of 653.
Use 5 as the next digit of our solution. 
Result so far: 133795.0
The remainder is 653 after subtracting 3400 from 4053.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6530, and continue the process.

Advancing to step 9:
6530 divided by 680 is 9 with a remainder of 410.
The number 9 becomes the next digit in our result. 
Result so far: 133795.9
If we subtract 6120 from 6530, we get 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4100, and continue the process.

Going ahead to step 10:
680 goes into 4100 6 times with a remainder of 20.
The number 6 becomes the next digit in our result. 
Result so far: 133795.96
Subtract 4080 from 4100 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 11:
680 can be fit into 200 0 times, resulting in a remainder of 200.
Record the quotient 0 as the next digit in the result. 
Result so far: 133795.96
Deduct 0 from 200 and we're left with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Let's proceed to step 12:
680 goes into 2000 2 times with a remainder of 640.
Record the quotient 2 as the next digit in the result. 
Result so far: 133795.9602
Subtract 1360 from 2000 to get 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

Going ahead to step 13:
The number 680 fits into 6400 9 times, leaving a remainder of 280.
Put 9 as the next digit of the answer. 
Result so far: 133795.96029
Subtract 6120 from 6400 to get 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Let's proceed to step 14:
If we divide 2800 by 680, we get 4 and a remainder of 80.
Record the quotient 4 as the next digit in the result. 
Result so far: 133795.960294
If we subtract 2720 from 2800, we get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Going ahead to step 15:
800 divided by 680 is 1 with a remainder of 120.
Write down 1 as next digit of the result. 
Result so far: 133795.9602941
The remainder is 120 after subtracting 680 from 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Let's proceed to step 16:
The number 680 fits into 1200 1 times, leaving a remainder of 520.
Use 1 as the next digit of our solution. 
Result so far: 133795.96029411
If we subtract 680 from 1200, we get 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

The final outcome is 133795.96029411, with a leftover of 5.2e-07.