821189 ÷ 51 
The aim is to understand the frequency of 51 in 821189.

Let's proceed to step 1:
8 divided by 51 is 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Bring next digit (2) of the dividend behind the 8 and repeat the process: 82 / 51

Moving on to step 2:
51 goes into 82 1 times with a remainder of 31.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 51 away from 82, we end up with 31.
Append the next digit (1) from the dividend to 31 and continue with: 311 / 51

Let's proceed to step 3:
51 goes into 311 6 times with a remainder of 5.
The number 6 becomes the next digit in our result. 
Result so far: 16.0
Deduct 306 from 311 and we're left with 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 51

Moving on to step 4:
If we divide 51 by 51, we get 1 and a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 161.0
If we take 51 away from 51, we end up with 0.
Include the next digit (8) from the dividend after 0, then repeat: 8 / 51

Advancing to step 5:
51 can be fit into 8 0 times, resulting in a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 1610.0
If we subtract 0 from 8, we get 8.
Grab the next digit (9) from the dividend, add it to 8, then carry on: 89 / 51

Moving on to step 6:
If we divide 89 by 51, we get 1 and a remainder of 38.
Use 1 as the next digit of our solution. 
Result so far: 16101.0
Deduct 51 from 89 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

On to step 7:
380 divided by 51 is 7 with a remainder of 23.
Put 7 as the next digit of the answer. 
Result so far: 16101.7
The remainder is 23 after subtracting 357 from 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Step 8:
51 can be fit into 230 4 times, resulting in a remainder of 26.
Put 4 as the next digit of the answer. 
Result so far: 16101.74
The remainder is 26 after subtracting 204 from 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Step 9:
51 goes into 260 5 times with a remainder of 5.
The next digit of our result is 5. 
Result so far: 16101.745
If we subtract 255 from 260, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 10:
50 divided by 51 is 0 with a remainder of 50.
Write down 0 as next digit of the result. 
Result so far: 16101.745
If we subtract 0 from 50, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 11:
When dividing 500 by 51, we get 9 with a remainder of 41.
The number 9 becomes the next digit in our result. 
Result so far: 16101.74509
The remainder is 41 after subtracting 459 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Moving on to step 12:
When dividing 410 by 51, we get 8 with a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 16101.745098
The remainder is 2 after subtracting 408 from 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 13:
The number 51 fits into 20 0 times, leaving a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 16101.745098
If we take 0 away from 20, we end up 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.

Going ahead to step 14:
51 goes into 200 3 times with a remainder of 47.
Put 3 as the next digit of the answer. 
Result so far: 16101.74509803
If we subtract 153 from 200, we get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

The final result is 16101.74509803 with a remainder of 4.7e-08.