We look at the division of 90990393 by 782 
The aim is to understand the frequency of 782 in 90990393.

On to step 1:
When dividing 9 by 782, we get 0 with a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Grab the next digit (0) from the dividend, add it to 9, then carry on: 90 / 782

Advancing to step 2:
782 goes into 90 0 times with a remainder of 90.
Put 0 as the next digit of the answer. 
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 / 782

Moving on to step 3:
782 goes into 909 1 times with a remainder of 127.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 782 away from 909, we end up with 127.
Take the next digit (9) from the dividend and append it to 127, then repeat: 1279 / 782

Going ahead to step 4:
1279 divided by 782 is 1 with a remainder of 497.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
Deduct 782 from 1279 and we're left with 497.
Take the next digit (0) from the dividend and append it to 497, then repeat: 4970 / 782

Moving on to step 5:
782 goes into 4970 6 times with a remainder of 278.
Use 6 as the next digit of our solution. 
Result so far: 116.0
The remainder is 278 after subtracting 4692 from 4970.
Bring next digit (3) of the dividend behind the 278 and repeat the process: 2783 / 782

Moving on to step 6:
If we divide 2783 by 782, we get 3 and a remainder of 437.
The next digit of our result is 3. 
Result so far: 1163.0
Subtract 2346 from 2783 to get 437.
Fetch the next digit (9) from the dividend, attach it to 437 and continue: 4379 / 782

Moving on to step 7:
The number 782 fits into 4379 5 times, leaving a remainder of 469.
Record the quotient 5 as the next digit in the result. 
Result so far: 11635.0
If we subtract 3910 from 4379, we get 469.
Take the next digit (3) from the dividend and append it to 469, then repeat: 4693 / 782

Advancing to step 8:
The number 782 fits into 4693 6 times, leaving a remainder of 1.
Use 6 as the next digit of our solution. 
Result so far: 116356.0
Subtracting 4692 from 4693 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 9:
782 can be fit into 10 0 times, resulting in a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 116356.0
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 10:
782 goes into 100 0 times with a remainder of 100.
Record the quotient 0 as the next digit in the result. 
Result so far: 116356.0
The remainder is 100 after subtracting 0 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Our division results in 116356.0 with a remaining 0.1.