99106906 divided by 781 
The aim is to understand the frequency of 781 in 99106906.

On to step 1:
9 divided by 781 is 0 with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Include the next digit (9) from the dividend after 9, then repeat: 99 / 781

Moving on to step 2:
781 goes into 99 0 times with a remainder of 99.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 99 to get 99.
Grab the next digit (1) from the dividend, add it to 99, then carry on: 991 / 781

Advancing to step 3:
When dividing 991 by 781, we get 1 with a remainder of 210.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 781 from 991 to get 210.
Append the next digit (0) from the dividend to 210 and continue with: 2100 / 781

Going ahead to step 4:
781 can be fit into 2100 2 times, resulting in a remainder of 538.
Write down 2 as next digit of the result. 
Result so far: 12.0
The remainder is 538 after subtracting 1562 from 2100.
Include the next digit (6) from the dividend after 538, then repeat: 5386 / 781

Advancing to step 5:
781 can be fit into 5386 6 times, resulting in a remainder of 700.
Write down 6 as next digit of the result. 
Result so far: 126.0
Deduct 4686 from 5386 and we're left with 700.
Grab the next digit (9) from the dividend, add it to 700, then carry on: 7009 / 781

Moving on to step 6:
The number 781 fits into 7009 8 times, leaving a remainder of 761.
The number 8 becomes the next digit in our result. 
Result so far: 1268.0
If we subtract 6248 from 7009, we get 761.
Append the next digit (0) from the dividend to 761 and continue with: 7610 / 781

Step 7:
If we divide 7610 by 781, we get 9 and a remainder of 581.
Record the quotient 9 as the next digit in the result. 
Result so far: 12689.0
Deduct 7029 from 7610 and we're left with 581.
Fetch the next digit (6) from the dividend, attach it to 581 and continue: 5816 / 781

Let's proceed to step 8:
If we divide 5816 by 781, we get 7 and a remainder of 349.
The next digit of our result is 7. 
Result so far: 126897.0
If we subtract 5467 from 5816, we get 349.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3490, and continue the process.

Let's proceed to step 9:
If we divide 3490 by 781, we get 4 and a remainder of 366.
The next digit of our result is 4. 
Result so far: 126897.4
Subtracting 3124 from 3490 leaves us with 366.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3660, and continue the process.

Moving on to step 10:
When dividing 3660 by 781, we get 4 with a remainder of 536.
Record the quotient 4 as the next digit in the result. 
Result so far: 126897.44
Subtract 3124 from 3660 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.

The final result is 126897.44 with a remainder of 0.536.