Let's divide 289693 by 21
The aim is to understand the frequency of 21 in 289693.

On to step 1:
2 divided by 21 is 0 with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Include the next digit (8) from the dividend after 2, then repeat: 28 / 21

Moving on to step 2:
21 can be fit into 28 1 times, resulting in a remainder of 7.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 21 from 28, we get 7.
Bring next digit (9) of the dividend behind the 7 and repeat the process: 79 / 21

On to step 3:
21 can be fit into 79 3 times, resulting in a remainder of 16.
Record the quotient 3 as the next digit in the result. 
Result so far: 13.0
Subtract 63 from 79 to get 16.
Take the next digit (6) from the dividend and append it to 16, then repeat: 166 / 21

Going ahead to step 4:
21 goes into 166 7 times with a remainder of 19.
Use 7 as the next digit of our solution. 
Result so far: 137.0
Subtracting 147 from 166 leaves us with 19.
Append the next digit (9) from the dividend to 19 and continue with: 199 / 21

Let's proceed to step 5:
21 goes into 199 9 times with a remainder of 10.
Write down 9 as next digit of the result. 
Result so far: 1379.0
Subtracting 189 from 199 leaves us with 10.
Append the next digit (3) from the dividend to 10 and continue with: 103 / 21

Moving on to step 6:
The number 21 fits into 103 4 times, leaving a remainder of 19.
The number 4 becomes the next digit in our result. 
Result so far: 13794.0
If we take 84 away from 103, we end up with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Going ahead to step 7:
When dividing 190 by 21, we get 9 with a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 13794.9
If we take 189 away from 190, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 8:
10 divided by 21 is 0 with a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 13794.9
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 9:
21 goes into 100 4 times with a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 13794.904
If we take 84 away from 100, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 10:
The number 21 fits into 160 7 times, leaving a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 13794.9047
Deduct 147 from 160 and we're left with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

On to step 11:
If we divide 130 by 21, we get 6 and a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 13794.90476
The remainder is 4 after subtracting 126 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 12:
The number 21 fits into 40 1 times, leaving a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 13794.904761
The remainder is 19 after subtracting 21 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Advancing to step 13:
When dividing 190 by 21, we get 9 with a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 13794.9047619
Subtracting 189 from 190 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 14:
The number 21 fits into 10 0 times, leaving a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 13794.9047619
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The quotient of the division is 13794.9047619, and the remainder is 1e-08.