We look at the division of 91766771 by 649 
The aim is to understand the frequency of 649 in 91766771.

Moving on to step 1:
649 goes into 9 0 times with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Bring next digit (1) of the dividend behind the 9 and repeat the process: 91 / 649

Let's proceed to step 2:
649 can be fit into 91 0 times, resulting in a remainder of 91.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 91 leaves us with 91.
Bring next digit (7) of the dividend behind the 91 and repeat the process: 917 / 649

Going ahead to step 3:
If we divide 917 by 649, we get 1 and a remainder of 268.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 649 from 917 and we're left with 268.
Take the next digit (6) from the dividend and append it to 268, then repeat: 2686 / 649

Step 4:
If we divide 2686 by 649, we get 4 and a remainder of 90.
Record the quotient 4 as the next digit in the result. 
Result so far: 14.0
If we subtract 2596 from 2686, we get 90.
Grab the next digit (6) from the dividend, add it to 90, then carry on: 906 / 649

Advancing to step 5:
906 divided by 649 is 1 with a remainder of 257.
Write down 1 as next digit of the result. 
Result so far: 141.0
If we take 649 away from 906, we end up with 257.
Bring next digit (7) of the dividend behind the 257 and repeat the process: 2577 / 649

Advancing to step 6:
649 goes into 2577 3 times with a remainder of 630.
Write down 3 as next digit of the result. 
Result so far: 1413.0
If we take 1947 away from 2577, we end up with 630.
Bring next digit (7) of the dividend behind the 630 and repeat the process: 6307 / 649

Let's proceed to step 7:
649 goes into 6307 9 times with a remainder of 466.
Use 9 as the next digit of our solution. 
Result so far: 14139.0
If we take 5841 away from 6307, we end up with 466.
Include the next digit (1) from the dividend after 466, then repeat: 4661 / 649

On to step 8:
649 can be fit into 4661 7 times, resulting in a remainder of 118.
Use 7 as the next digit of our solution. 
Result so far: 141397.0
Subtracting 4543 from 4661 leaves us with 118.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1180, and continue the process.

Moving on to step 9:
When dividing 1180 by 649, we get 1 with a remainder of 531.
The next digit of our result is 1. 
Result so far: 141397.1
Deduct 649 from 1180 and we're left with 531.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5310, and continue the process.

Advancing to step 10:
649 can be fit into 5310 8 times, resulting in a remainder of 118.
Use 8 as the next digit of our solution. 
Result so far: 141397.18
If we take 5192 away from 5310, we end up with 118.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1180, and continue the process.

Advancing to step 11:
1180 divided by 649 is 1 with a remainder of 531.
Write down 1 as next digit of the result. 
Result so far: 141397.181
The remainder is 531 after subtracting 649 from 1180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5310, and continue the process.

Advancing to step 12:
649 goes into 5310 8 times with a remainder of 118.
Write down 8 as next digit of the result. 
Result so far: 141397.1818
If we take 5192 away from 5310, we end up with 118.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1180, and continue the process.

Going ahead to step 13:
The number 649 fits into 1180 1 times, leaving a remainder of 531.
Record the quotient 1 as the next digit in the result. 
Result so far: 141397.18181
If we subtract 649 from 1180, we get 531.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5310, and continue the process.

Going ahead to step 14:
649 can be fit into 5310 8 times, resulting in a remainder of 118.
The number 8 becomes the next digit in our result. 
Result so far: 141397.181818
If we take 5192 away from 5310, we end up with 118.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1180, and continue the process.

On to step 15:
649 can be fit into 1180 1 times, resulting in a remainder of 531.
Use 1 as the next digit of our solution. 
Result so far: 141397.1818181
Subtracting 649 from 1180 leaves us with 531.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5310, and continue the process.

Going ahead to step 16:
649 goes into 5310 8 times with a remainder of 118.
Use 8 as the next digit of our solution. 
Result so far: 141397.18181818
If we subtract 5192 from 5310, we get 118.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1180, and continue the process.

The final result is 141397.18181818 with a remainder of 1.18e-07.