11990228 divided by 646 
The aim is to understand the frequency of 646 in 11990228.

Advancing to step 1:
When dividing 1 by 646, we get 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Include the next digit (1) from the dividend after 1, then repeat: 11 / 646

Moving on to step 2:
646 can be fit into 11 0 times, resulting in a remainder of 11.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 11 leaves us with 11.
Fetch the next digit (9) from the dividend, attach it to 11 and continue: 119 / 646

On to step 3:
The number 646 fits into 119 0 times, leaving a remainder of 119.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 119 leaves us with 119.
Take the next digit (9) from the dividend and append it to 119, then repeat: 1199 / 646

Moving on to step 4:
When dividing 1199 by 646, we get 1 with a remainder of 553.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 646 from 1199 to get 553.
Bring next digit (0) of the dividend behind the 553 and repeat the process: 5530 / 646

Going ahead to step 5:
When dividing 5530 by 646, we get 8 with a remainder of 362.
Use 8 as the next digit of our solution. 
Result so far: 18.0
The remainder is 362 after subtracting 5168 from 5530.
Grab the next digit (2) from the dividend, add it to 362, then carry on: 3622 / 646

Moving on to step 6:
646 goes into 3622 5 times with a remainder of 392.
Use 5 as the next digit of our solution. 
Result so far: 185.0
The remainder is 392 after subtracting 3230 from 3622.
Include the next digit (2) from the dividend after 392, then repeat: 3922 / 646

Advancing to step 7:
646 can be fit into 3922 6 times, resulting in a remainder of 46.
Use 6 as the next digit of our solution. 
Result so far: 1856.0
Subtract 3876 from 3922 to get 46.
Bring next digit (8) of the dividend behind the 46 and repeat the process: 468 / 646

Going ahead to step 8:
646 can be fit into 468 0 times, resulting in a remainder of 468.
Use 0 as the next digit of our solution. 
Result so far: 18560.0
Deduct 0 from 468 and we're left with 468.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4680, and continue the process.

Going ahead to step 9:
646 can be fit into 4680 7 times, resulting in a remainder of 158.
Record the quotient 7 as the next digit in the result. 
Result so far: 18560.7
Subtract 4522 from 4680 to get 158.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1580, and continue the process.

Going ahead to step 10:
If we divide 1580 by 646, we get 2 and a remainder of 288.
The number 2 becomes the next digit in our result. 
Result so far: 18560.72
Subtracting 1292 from 1580 leaves us with 288.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2880, and continue the process.

Advancing to step 11:
2880 divided by 646 is 4 with a remainder of 296.
Record the quotient 4 as the next digit in the result. 
Result so far: 18560.724
Deduct 2584 from 2880 and we're left with 296.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2960, and continue the process.

Let's proceed to step 12:
2960 divided by 646 is 4 with a remainder of 376.
Use 4 as the next digit of our solution. 
Result so far: 18560.7244
If we subtract 2584 from 2960, we get 376.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3760, and continue the process.

The quotient of the division is 18560.7244, and the remainder is 0.00376.