136850 divided by 21 
The aim is to understand the frequency of 21 in 136850.

On to step 1:
If we divide 1 by 21, we get 0 and a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Include the next digit (3) from the dividend after 1, then repeat: 13 / 21

Let's proceed to step 2:
The number 21 fits into 13 0 times, leaving a remainder of 13.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 13 to get 13.
Fetch the next digit (6) from the dividend, attach it to 13 and continue: 136 / 21

Going ahead to step 3:
21 goes into 136 6 times with a remainder of 10.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
If we take 126 away from 136, we end up with 10.
Bring next digit (8) of the dividend behind the 10 and repeat the process: 108 / 21

Moving on to step 4:
When dividing 108 by 21, we get 5 with a remainder of 3.
The number 5 becomes the next digit in our result. 
Result so far: 65.0
Subtracting 105 from 108 leaves us with 3.
Append the next digit (5) from the dividend to 3 and continue with: 35 / 21

Let's proceed to step 5:
The number 21 fits into 35 1 times, leaving a remainder of 14.
Write down 1 as next digit of the result. 
Result so far: 651.0
Subtracting 21 from 35 leaves us with 14.
Take the next digit (0) from the dividend and append it to 14, then repeat: 140 / 21

On to step 6:
The number 21 fits into 140 6 times, leaving a remainder of 14.
The next digit of our result is 6. 
Result so far: 6516.0
If we take 126 away from 140, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 7:
140 divided by 21 is 6 with a remainder of 14.
The next digit of our result is 6. 
Result so far: 6516.6
The remainder is 14 after subtracting 126 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 8:
If we divide 140 by 21, we get 6 and a remainder of 14.
The next digit of our result is 6. 
Result so far: 6516.66
Subtracting 126 from 140 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

After the division, we end up with 6516.66 and a remainder of 0.014.