91265101 divided by 646 
The aim is to understand the frequency of 646 in 91265101.

On to step 1:
646 can be fit into 9 0 times, resulting in a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Fetch the next digit (1) from the dividend, attach it to 9 and continue: 91 / 646

On to step 2:
If we divide 91 by 646, we get 0 and a remainder of 91.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 91 leaves us with 91.
Take the next digit (2) from the dividend and append it to 91, then repeat: 912 / 646

Let's proceed to step 3:
912 divided by 646 is 1 with a remainder of 266.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 646 from 912, we get 266.
Grab the next digit (6) from the dividend, add it to 266, then carry on: 2666 / 646

Advancing to step 4:
If we divide 2666 by 646, we get 4 and a remainder of 82.
Put 4 as the next digit of the answer. 
Result so far: 14.0
If we take 2584 away from 2666, we end up with 82.
Fetch the next digit (5) from the dividend, attach it to 82 and continue: 825 / 646

Going ahead to step 5:
If we divide 825 by 646, we get 1 and a remainder of 179.
Record the quotient 1 as the next digit in the result. 
Result so far: 141.0
Subtracting 646 from 825 leaves us with 179.
Fetch the next digit (1) from the dividend, attach it to 179 and continue: 1791 / 646

Let's proceed to step 6:
646 goes into 1791 2 times with a remainder of 499.
The number 2 becomes the next digit in our result. 
Result so far: 1412.0
Deduct 1292 from 1791 and we're left with 499.
Grab the next digit (0) from the dividend, add it to 499, then carry on: 4990 / 646

Let's proceed to step 7:
The number 646 fits into 4990 7 times, leaving a remainder of 468.
Use 7 as the next digit of our solution. 
Result so far: 14127.0
If we take 4522 away from 4990, we end up with 468.
Grab the next digit (1) from the dividend, add it to 468, then carry on: 4681 / 646

Let's proceed to step 8:
646 can be fit into 4681 7 times, resulting in a remainder of 159.
The next digit of our result is 7. 
Result so far: 141277.0
Deduct 4522 from 4681 and we're left with 159.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1590, and continue the process.

Step 9:
1590 divided by 646 is 2 with a remainder of 298.
Record the quotient 2 as the next digit in the result. 
Result so far: 141277.2
If we take 1292 away from 1590, we end up with 298.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2980, and continue the process.

Step 10:
If we divide 2980 by 646, we get 4 and a remainder of 396.
Record the quotient 4 as the next digit in the result. 
Result so far: 141277.24
The remainder is 396 after subtracting 2584 from 2980.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3960, and continue the process.

Step 11:
646 can be fit into 3960 6 times, resulting in a remainder of 84.
Put 6 as the next digit of the answer. 
Result so far: 141277.246
Subtracting 3876 from 3960 leaves us with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Let's proceed to step 12:
The number 646 fits into 840 1 times, leaving a remainder of 194.
Record the quotient 1 as the next digit in the result. 
Result so far: 141277.2461
Subtracting 646 from 840 leaves us with 194.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1940, and continue the process.

Going ahead to step 13:
646 goes into 1940 3 times with a remainder of 2.
The number 3 becomes the next digit in our result. 
Result so far: 141277.24613
If we subtract 1938 from 1940, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 14:
When dividing 20 by 646, we get 0 with a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 141277.24613
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 15:
646 can be fit into 200 0 times, resulting in a remainder of 200.
Use 0 as the next digit of our solution. 
Result so far: 141277.24613
Subtracting 0 from 200 leaves us 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.

The quotient of the division is 141277.24613, and the remainder is 2e-06.