Let's divide 19400196 by 210
The aim is to understand the frequency of 210 in 19400196.

On to step 1:
The number 210 fits into 1 0 times, leaving a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Include the next digit (9) from the dividend after 1, then repeat: 19 / 210

Let's proceed to step 2:
210 goes into 19 0 times with a remainder of 19.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 19 and we're left with 19.
Fetch the next digit (4) from the dividend, attach it to 19 and continue: 194 / 210

On to step 3:
210 goes into 194 0 times with a remainder of 194.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 194, we end up with 194.
Include the next digit (0) from the dividend after 194, then repeat: 1940 / 210

Advancing to step 4:
1940 divided by 210 is 9 with a remainder of 50.
The next digit of our result is 9. 
Result so far: 9.0
If we take 1890 away from 1940, we end up with 50.
Bring next digit (0) of the dividend behind the 50 and repeat the process: 500 / 210

On to step 5:
210 can be fit into 500 2 times, resulting in a remainder of 80.
Put 2 as the next digit of the answer. 
Result so far: 92.0
Subtract 420 from 500 to get 80.
Take the next digit (1) from the dividend and append it to 80, then repeat: 801 / 210

Advancing to step 6:
If we divide 801 by 210, we get 3 and a remainder of 171.
The number 3 becomes the next digit in our result. 
Result so far: 923.0
The remainder is 171 after subtracting 630 from 801.
Include the next digit (9) from the dividend after 171, then repeat: 1719 / 210

Let's proceed to step 7:
1719 divided by 210 is 8 with a remainder of 39.
Write down 8 as next digit of the result. 
Result so far: 9238.0
The remainder is 39 after subtracting 1680 from 1719.
Grab the next digit (6) from the dividend, add it to 39, then carry on: 396 / 210

Going ahead to step 8:
210 can be fit into 396 1 times, resulting in a remainder of 186.
Use 1 as the next digit of our solution. 
Result so far: 92381.0
Deduct 210 from 396 and we're left with 186.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1860, and continue the process.

On to step 9:
210 can be fit into 1860 8 times, resulting in a remainder of 180.
Write down 8 as next digit of the result. 
Result so far: 92381.8
Subtract 1680 from 1860 to get 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Let's proceed to step 10:
1800 divided by 210 is 8 with a remainder of 120.
Record the quotient 8 as the next digit in the result. 
Result so far: 92381.88
If we take 1680 away from 1800, we end up with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

The final result is 92381.88 with a remainder of 0.12.