We're dividing 21961087 by 412 
The aim is to understand the frequency of 412 in 21961087.

Going ahead to step 1:
412 can be fit into 2 0 times, resulting in a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 412

Advancing to step 2:
412 can be fit into 21 0 times, resulting in a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 21 leaves us with 21.
Grab the next digit (9) from the dividend, add it to 21, then carry on: 219 / 412

Advancing to step 3:
The number 412 fits into 219 0 times, leaving a remainder of 219.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 219 leaves us with 219.
Take the next digit (6) from the dividend and append it to 219, then repeat: 2196 / 412

Going ahead to step 4:
The number 412 fits into 2196 5 times, leaving a remainder of 136.
The next digit of our result is 5. 
Result so far: 5.0
Subtracting 2060 from 2196 leaves us with 136.
Take the next digit (1) from the dividend and append it to 136, then repeat: 1361 / 412

Moving on to step 5:
412 goes into 1361 3 times with a remainder of 125.
The number 3 becomes the next digit in our result. 
Result so far: 53.0
Subtracting 1236 from 1361 leaves us with 125.
Take the next digit (0) from the dividend and append it to 125, then repeat: 1250 / 412

Step 6:
412 goes into 1250 3 times with a remainder of 14.
Write down 3 as next digit of the result. 
Result so far: 533.0
If we subtract 1236 from 1250, we get 14.
Bring next digit (8) of the dividend behind the 14 and repeat the process: 148 / 412

On to step 7:
When dividing 148 by 412, we get 0 with a remainder of 148.
Put 0 as the next digit of the answer. 
Result so far: 5330.0
The remainder is 148 after subtracting 0 from 148.
Fetch the next digit (7) from the dividend, attach it to 148 and continue: 1487 / 412

Moving on to step 8:
The number 412 fits into 1487 3 times, leaving a remainder of 251.
The next digit of our result is 3. 
Result so far: 53303.0
Deduct 1236 from 1487 and we're left with 251.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2510, and continue the process.

Moving on to step 9:
The number 412 fits into 2510 6 times, leaving a remainder of 38.
The number 6 becomes the next digit in our result. 
Result so far: 53303.6
If we subtract 2472 from 2510, we get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Let's proceed to step 10:
412 goes into 380 0 times with a remainder of 380.
The next digit of our result is 0. 
Result so far: 53303.6
The remainder is 380 after subtracting 0 from 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

Step 11:
412 goes into 3800 9 times with a remainder of 92.
The number 9 becomes the next digit in our result. 
Result so far: 53303.609
Subtract 3708 from 3800 to get 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Step 12:
412 goes into 920 2 times with a remainder of 96.
The next digit of our result is 2. 
Result so far: 53303.6092
If we subtract 824 from 920, we get 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

Step 13:
The number 412 fits into 960 2 times, leaving a remainder of 136.
The number 2 becomes the next digit in our result. 
Result so far: 53303.60922
Deduct 824 from 960 and we're left with 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

After the division, we end up with 53303.60922 and a remainder of 0.000136.