We divide 91313524 by 646
The aim is to understand the frequency of 646 in 91313524.

Going ahead to step 1:
9 divided by 646 is 0 with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Take the next digit (1) from the dividend and append it to 9, then repeat: 91 / 646

Going ahead to step 2:
The number 646 fits into 91 0 times, leaving a remainder of 91.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 91 leaves us with 91.
Append the next digit (3) from the dividend to 91 and continue with: 913 / 646

On to step 3:
When dividing 913 by 646, we get 1 with a remainder of 267.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 646 from 913 and we're left with 267.
Append the next digit (1) from the dividend to 267 and continue with: 2671 / 646

Advancing to step 4:
The number 646 fits into 2671 4 times, leaving a remainder of 87.
The number 4 becomes the next digit in our result. 
Result so far: 14.0
Subtract 2584 from 2671 to get 87.
Take the next digit (3) from the dividend and append it to 87, then repeat: 873 / 646

Moving on to step 5:
The number 646 fits into 873 1 times, leaving a remainder of 227.
Write down 1 as next digit of the result. 
Result so far: 141.0
If we take 646 away from 873, we end up with 227.
Fetch the next digit (5) from the dividend, attach it to 227 and continue: 2275 / 646

Step 6:
646 can be fit into 2275 3 times, resulting in a remainder of 337.
The number 3 becomes the next digit in our result. 
Result so far: 1413.0
If we subtract 1938 from 2275, we get 337.
Include the next digit (2) from the dividend after 337, then repeat: 3372 / 646

Moving on to step 7:
If we divide 3372 by 646, we get 5 and a remainder of 142.
Put 5 as the next digit of the answer. 
Result so far: 14135.0
If we take 3230 away from 3372, we end up with 142.
Grab the next digit (4) from the dividend, add it to 142, then carry on: 1424 / 646

Let's proceed to step 8:
If we divide 1424 by 646, we get 2 and a remainder of 132.
Put 2 as the next digit of the answer. 
Result so far: 141352.0
If we take 1292 away from 1424, we end up with 132.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1320, and continue the process.

Moving on to step 9:
The number 646 fits into 1320 2 times, leaving a remainder of 28.
The number 2 becomes the next digit in our result. 
Result so far: 141352.2
Subtract 1292 from 1320 to get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Moving on to step 10:
When dividing 280 by 646, we get 0 with a remainder of 280.
The next digit of our result is 0. 
Result so far: 141352.2
If we take 0 away from 280, we end up with 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Going ahead to step 11:
The number 646 fits into 2800 4 times, leaving a remainder of 216.
Use 4 as the next digit of our solution. 
Result so far: 141352.204
Subtracting 2584 from 2800 leaves us with 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

Going ahead to step 12:
The number 646 fits into 2160 3 times, leaving a remainder of 222.
Put 3 as the next digit of the answer. 
Result so far: 141352.2043
Subtract 1938 from 2160 to get 222.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2220, and continue the process.

Advancing to step 13:
2220 divided by 646 is 3 with a remainder of 282.
The next digit of our result is 3. 
Result so far: 141352.20433
Subtracting 1938 from 2220 leaves us with 282.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2820, and continue the process.

Our division results in 141352.20433 with a remaining 0.000282.