We look at the division of 791433 by 87 
The aim is to understand the frequency of 87 in 791433.

Moving on to step 1:
The number 87 fits into 7 0 times, leaving a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Append the next digit (9) from the dividend to 7 and continue with: 79 / 87

Moving on to step 2:
If we divide 79 by 87, we get 0 and a remainder of 79.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 79 leaves us with 79.
Fetch the next digit (1) from the dividend, attach it to 79 and continue: 791 / 87

Step 3:
The number 87 fits into 791 9 times, leaving a remainder of 8.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Deduct 783 from 791 and we're left with 8.
Grab the next digit (4) from the dividend, add it to 8, then carry on: 84 / 87

Moving on to step 4:
87 can be fit into 84 0 times, resulting in a remainder of 84.
Put 0 as the next digit of the answer. 
Result so far: 90.0
If we take 0 away from 84, we end up with 84.
Include the next digit (3) from the dividend after 84, then repeat: 843 / 87

Moving on to step 5:
87 goes into 843 9 times with a remainder of 60.
Put 9 as the next digit of the answer. 
Result so far: 909.0
Subtracting 783 from 843 leaves us with 60.
Append the next digit (3) from the dividend to 60 and continue with: 603 / 87

Going ahead to step 6:
87 goes into 603 6 times with a remainder of 81.
The next digit of our result is 6. 
Result so far: 9096.0
Deduct 522 from 603 and we're left with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Going ahead to step 7:
87 goes into 810 9 times with a remainder of 27.
Write down 9 as next digit of the result. 
Result so far: 9096.9
If we subtract 783 from 810, we get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Let's proceed to step 8:
87 can be fit into 270 3 times, resulting in a remainder of 9.
The next digit of our result is 3. 
Result so far: 9096.93
Subtract 261 from 270 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 9:
90 divided by 87 is 1 with a remainder of 3.
The next digit of our result is 1. 
Result so far: 9096.931
If we take 87 away from 90, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 10:
If we divide 30 by 87, we get 0 and a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 9096.931
Deduct 0 from 30 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 11:
87 goes into 300 3 times with a remainder of 39.
The number 3 becomes the next digit in our result. 
Result so far: 9096.93103
Subtracting 261 from 300 leaves us with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Step 12:
87 can be fit into 390 4 times, resulting in a remainder of 42.
Write down 4 as next digit of the result. 
Result so far: 9096.931034
Subtract 348 from 390 to get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Moving on to step 13:
If we divide 420 by 87, we get 4 and a remainder of 72.
Use 4 as the next digit of our solution. 
Result so far: 9096.9310344
The remainder is 72 after subtracting 348 from 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

After the division, we end up with 9096.9310344 and a remainder of 7.2e-07.