We're dividing 769591 by 87 
The aim is to understand the frequency of 87 in 769591.

Advancing to step 1:
The number 87 fits into 7 0 times, leaving a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Take the next digit (6) from the dividend and append it to 7, then repeat: 76 / 87

Advancing to step 2:
When dividing 76 by 87, we get 0 with a remainder of 76.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 76 and we're left with 76.
Fetch the next digit (9) from the dividend, attach it to 76 and continue: 769 / 87

Going ahead to step 3:
If we divide 769 by 87, we get 8 and a remainder of 73.
Put 8 as the next digit of the answer. 
Result so far: 8.0
The remainder is 73 after subtracting 696 from 769.
Take the next digit (5) from the dividend and append it to 73, then repeat: 735 / 87

Moving on to step 4:
87 goes into 735 8 times with a remainder of 39.
Put 8 as the next digit of the answer. 
Result so far: 88.0
The remainder is 39 after subtracting 696 from 735.
Take the next digit (9) from the dividend and append it to 39, then repeat: 399 / 87

On to step 5:
87 can be fit into 399 4 times, resulting in a remainder of 51.
The next digit of our result is 4. 
Result so far: 884.0
Deduct 348 from 399 and we're left with 51.
Include the next digit (1) from the dividend after 51, then repeat: 511 / 87

Step 6:
The number 87 fits into 511 5 times, leaving a remainder of 76.
The number 5 becomes the next digit in our result. 
Result so far: 8845.0
Subtracting 435 from 511 leaves us with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Let's proceed to step 7:
When dividing 760 by 87, we get 8 with a remainder of 64.
Write down 8 as next digit of the result. 
Result so far: 8845.8
If we subtract 696 from 760, we get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Step 8:
If we divide 640 by 87, we get 7 and a remainder of 31.
Put 7 as the next digit of the answer. 
Result so far: 8845.87
Subtract 609 from 640 to get 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Going ahead to step 9:
87 goes into 310 3 times with a remainder of 49.
The number 3 becomes the next digit in our result. 
Result so far: 8845.873
Deduct 261 from 310 and we're left with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Let's proceed to step 10:
87 goes into 490 5 times with a remainder of 55.
Record the quotient 5 as the next digit in the result. 
Result so far: 8845.8735
Deduct 435 from 490 and we're left with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Let's proceed to step 11:
87 can be fit into 550 6 times, resulting in a remainder of 28.
The next digit of our result is 6. 
Result so far: 8845.87356
If we take 522 away from 550, we end up with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Going ahead to step 12:
87 goes into 280 3 times with a remainder of 19.
The next digit of our result is 3. 
Result so far: 8845.873563
The remainder is 19 after subtracting 261 from 280.
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 13:
When dividing 190 by 87, we get 2 with a remainder of 16.
Use 2 as the next digit of our solution. 
Result so far: 8845.8735632
Subtracting 174 from 190 leaves us 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.

On to step 14:
87 can be fit into 160 1 times, resulting in a remainder of 73.
The number 1 becomes the next digit in our result. 
Result so far: 8845.87356321
If we subtract 87 from 160, we get 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

The final outcome is 8845.87356321, with a leftover of 7.3e-08.