We're dividing 15967651 by 865 
The aim is to understand the frequency of 865 in 15967651.

Moving on to step 1:
865 goes into 1 0 times with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 865

Going ahead to step 2:
If we divide 15 by 865, we get 0 and a remainder of 15.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 15 and we're left with 15.
Fetch the next digit (9) from the dividend, attach it to 15 and continue: 159 / 865

Going ahead to step 3:
When dividing 159 by 865, we get 0 with a remainder of 159.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 159, we end up with 159.
Append the next digit (6) from the dividend to 159 and continue with: 1596 / 865

Going ahead to step 4:
865 can be fit into 1596 1 times, resulting in a remainder of 731.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 865 away from 1596, we end up with 731.
Take the next digit (7) from the dividend and append it to 731, then repeat: 7317 / 865

Step 5:
The number 865 fits into 7317 8 times, leaving a remainder of 397.
Use 8 as the next digit of our solution. 
Result so far: 18.0
Subtract 6920 from 7317 to get 397.
Append the next digit (6) from the dividend to 397 and continue with: 3976 / 865

Advancing to step 6:
865 goes into 3976 4 times with a remainder of 516.
Put 4 as the next digit of the answer. 
Result so far: 184.0
If we subtract 3460 from 3976, we get 516.
Take the next digit (5) from the dividend and append it to 516, then repeat: 5165 / 865

On to step 7:
When dividing 5165 by 865, we get 5 with a remainder of 840.
Use 5 as the next digit of our solution. 
Result so far: 1845.0
If we take 4325 away from 5165, we end up with 840.
Fetch the next digit (1) from the dividend, attach it to 840 and continue: 8401 / 865

On to step 8:
If we divide 8401 by 865, we get 9 and a remainder of 616.
Use 9 as the next digit of our solution. 
Result so far: 18459.0
If we subtract 7785 from 8401, we get 616.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6160, and continue the process.

Let's proceed to step 9:
If we divide 6160 by 865, we get 7 and a remainder of 105.
Put 7 as the next digit of the answer. 
Result so far: 18459.7
Deduct 6055 from 6160 and we're left with 105.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1050, and continue the process.

Let's proceed to step 10:
The number 865 fits into 1050 1 times, leaving a remainder of 185.
Record the quotient 1 as the next digit in the result. 
Result so far: 18459.71
Subtract 865 from 1050 to get 185.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1850, and continue the process.

Advancing to step 11:
865 can be fit into 1850 2 times, resulting in a remainder of 120.
Use 2 as the next digit of our solution. 
Result so far: 18459.712
If we subtract 1730 from 1850, we get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Moving on to step 12:
If we divide 1200 by 865, we get 1 and a remainder of 335.
Put 1 as the next digit of the answer. 
Result so far: 18459.7121
If we take 865 away from 1200, we end up with 335.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3350, and continue the process.

Moving on to step 13:
3350 divided by 865 is 3 with a remainder of 755.
Use 3 as the next digit of our solution. 
Result so far: 18459.71213
Subtract 2595 from 3350 to get 755.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7550, and continue the process.

Step 14:
7550 divided by 865 is 8 with a remainder of 630.
Use 8 as the next digit of our solution. 
Result so far: 18459.712138
If we take 6920 away from 7550, we end up with 630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6300, and continue the process.

Going ahead to step 15:
When dividing 6300 by 865, we get 7 with a remainder of 245.
Put 7 as the next digit of the answer. 
Result so far: 18459.7121387
Subtracting 6055 from 6300 leaves us with 245.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2450, and continue the process.

Advancing to step 16:
When dividing 2450 by 865, we get 2 with a remainder of 720.
Put 2 as the next digit of the answer. 
Result so far: 18459.71213872
Subtract 1730 from 2450 to get 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7200, and continue the process.

Our division results in 18459.71213872 with a remaining 7.2e-07.