Let's divide 15987951 by 724
The aim is to understand the frequency of 724 in 15987951.

Moving on to step 1:
When dividing 1 by 724, we get 0 with 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 (5) from the dividend after 1, then repeat: 15 / 724

Step 2:
724 can be fit into 15 0 times, resulting in a remainder of 15.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 15 to get 15.
Include the next digit (9) from the dividend after 15, then repeat: 159 / 724

Advancing to step 3:
159 divided by 724 is 0 with a remainder of 159.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 159 leaves us with 159.
Grab the next digit (8) from the dividend, add it to 159, then carry on: 1598 / 724

Advancing to step 4:
724 can be fit into 1598 2 times, resulting in a remainder of 150.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we subtract 1448 from 1598, we get 150.
Grab the next digit (7) from the dividend, add it to 150, then carry on: 1507 / 724

Going ahead to step 5:
1507 divided by 724 is 2 with a remainder of 59.
Write down 2 as next digit of the result. 
Result so far: 22.0
The remainder is 59 after subtracting 1448 from 1507.
Include the next digit (9) from the dividend after 59, then repeat: 599 / 724

On to step 6:
724 can be fit into 599 0 times, resulting in a remainder of 599.
Write down 0 as next digit of the result. 
Result so far: 220.0
If we take 0 away from 599, we end up with 599.
Bring next digit (5) of the dividend behind the 599 and repeat the process: 5995 / 724

Going ahead to step 7:
When dividing 5995 by 724, we get 8 with a remainder of 203.
Put 8 as the next digit of the answer. 
Result so far: 2208.0
If we subtract 5792 from 5995, we get 203.
Fetch the next digit (1) from the dividend, attach it to 203 and continue: 2031 / 724

Step 8:
The number 724 fits into 2031 2 times, leaving a remainder of 583.
The next digit of our result is 2. 
Result so far: 22082.0
Subtracting 1448 from 2031 leaves us with 583.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5830, and continue the process.

Moving on to step 9:
If we divide 5830 by 724, we get 8 and a remainder of 38.
Use 8 as the next digit of our solution. 
Result so far: 22082.8
Subtract 5792 from 5830 to get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Let's proceed to step 10:
The number 724 fits into 380 0 times, leaving a remainder of 380.
Use 0 as the next digit of our solution. 
Result so far: 22082.8
Deduct 0 from 380 and we're left with 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

Step 11:
If we divide 3800 by 724, we get 5 and a remainder of 180.
Write down 5 as next digit of the result. 
Result so far: 22082.805
Deduct 3620 from 3800 and we're left with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Step 12:
1800 divided by 724 is 2 with a remainder of 352.
Write down 2 as next digit of the result. 
Result so far: 22082.8052
Subtracting 1448 from 1800 leaves us with 352.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3520, and continue the process.

Moving on to step 13:
724 can be fit into 3520 4 times, resulting in a remainder of 624.
The next digit of our result is 4. 
Result so far: 22082.80524
Deduct 2896 from 3520 and we're left with 624.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6240, and continue the process.

Going ahead to step 14:
724 can be fit into 6240 8 times, resulting in a remainder of 448.
The number 8 becomes the next digit in our result. 
Result so far: 22082.805248
Deduct 5792 from 6240 and we're left with 448.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4480, and continue the process.

Step 15:
724 goes into 4480 6 times with a remainder of 136.
Use 6 as the next digit of our solution. 
Result so far: 22082.8052486
If we subtract 4344 from 4480, we get 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Advancing to step 16:
The number 724 fits into 1360 1 times, leaving a remainder of 636.
Put 1 as the next digit of the answer. 
Result so far: 22082.80524861
Subtract 724 from 1360 to get 636.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6360, and continue the process.

The final outcome is 22082.80524861, with a leftover of 6.36e-07.