We're dividing 21458075 by 731 
The aim is to understand the frequency of 731 in 21458075.

Advancing to step 1:
When dividing 2 by 731, we get 0 with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 731

Let's proceed to step 2:
The number 731 fits into 21 0 times, leaving a remainder of 21.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Bring next digit (4) of the dividend behind the 21 and repeat the process: 214 / 731

Advancing to step 3:
The number 731 fits into 214 0 times, leaving a remainder of 214.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 214 to get 214.
Take the next digit (5) from the dividend and append it to 214, then repeat: 2145 / 731

Let's proceed to step 4:
2145 divided by 731 is 2 with a remainder of 683.
Write down 2 as next digit of the result. 
Result so far: 2.0
The remainder is 683 after subtracting 1462 from 2145.
Bring next digit (8) of the dividend behind the 683 and repeat the process: 6838 / 731

Going ahead to step 5:
When dividing 6838 by 731, we get 9 with a remainder of 259.
Put 9 as the next digit of the answer. 
Result so far: 29.0
The remainder is 259 after subtracting 6579 from 6838.
Bring next digit (0) of the dividend behind the 259 and repeat the process: 2590 / 731

Let's proceed to step 6:
The number 731 fits into 2590 3 times, leaving a remainder of 397.
The number 3 becomes the next digit in our result. 
Result so far: 293.0
Deduct 2193 from 2590 and we're left with 397.
Include the next digit (7) from the dividend after 397, then repeat: 3977 / 731

Moving on to step 7:
3977 divided by 731 is 5 with a remainder of 322.
Record the quotient 5 as the next digit in the result. 
Result so far: 2935.0
Subtracting 3655 from 3977 leaves us with 322.
Fetch the next digit (5) from the dividend, attach it to 322 and continue: 3225 / 731

Step 8:
The number 731 fits into 3225 4 times, leaving a remainder of 301.
The number 4 becomes the next digit in our result. 
Result so far: 29354.0
If we take 2924 away from 3225, we end up with 301.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3010, and continue the process.

Advancing to step 9:
The number 731 fits into 3010 4 times, leaving a remainder of 86.
Write down 4 as next digit of the result. 
Result so far: 29354.4
The remainder is 86 after subtracting 2924 from 3010.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

Step 10:
When dividing 860 by 731, we get 1 with a remainder of 129.
Put 1 as the next digit of the answer. 
Result so far: 29354.41
Deduct 731 from 860 and we're left with 129.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1290, and continue the process.

Let's proceed to step 11:
The number 731 fits into 1290 1 times, leaving a remainder of 559.
Use 1 as the next digit of our solution. 
Result so far: 29354.411
The remainder is 559 after subtracting 731 from 1290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5590, and continue the process.

The final outcome is 29354.411, with a leftover of 0.0559.