We look at the division of 689933 by 87 
The aim is to understand the frequency of 87 in 689933.

On to step 1:
87 can be fit into 6 0 times, resulting in a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Include the next digit (8) from the dividend after 6, then repeat: 68 / 87

Step 2:
68 divided by 87 is 0 with a remainder of 68.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 68, we end up with 68.
Fetch the next digit (9) from the dividend, attach it to 68 and continue: 689 / 87

Let's proceed to step 3:
87 can be fit into 689 7 times, resulting in a remainder of 80.
The next digit of our result is 7. 
Result so far: 7.0
If we subtract 609 from 689, we get 80.
Take the next digit (9) from the dividend and append it to 80, then repeat: 809 / 87

Step 4:
87 goes into 809 9 times with a remainder of 26.
The number 9 becomes the next digit in our result. 
Result so far: 79.0
Subtracting 783 from 809 leaves us with 26.
Take the next digit (3) from the dividend and append it to 26, then repeat: 263 / 87

Going ahead to step 5:
The number 87 fits into 263 3 times, leaving a remainder of 2.
Put 3 as the next digit of the answer. 
Result so far: 793.0
Subtract 261 from 263 to get 2.
Append the next digit (3) from the dividend to 2 and continue with: 23 / 87

Advancing to step 6:
If we divide 23 by 87, we get 0 and a remainder of 23.
Use 0 as the next digit of our solution. 
Result so far: 7930.0
If we subtract 0 from 23, we get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Step 7:
87 can be fit into 230 2 times, resulting in a remainder of 56.
Write down 2 as next digit of the result. 
Result so far: 7930.2
If we subtract 174 from 230, we get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Moving on to step 8:
87 goes into 560 6 times with a remainder of 38.
The number 6 becomes the next digit in our result. 
Result so far: 7930.26
If we subtract 522 from 560, we 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 9:
87 goes into 380 4 times with a remainder of 32.
The next digit of our result is 4. 
Result so far: 7930.264
Subtracting 348 from 380 leaves us with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Step 10:
When dividing 320 by 87, we get 3 with a remainder of 59.
Use 3 as the next digit of our solution. 
Result so far: 7930.2643
Subtract 261 from 320 to get 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Moving on to step 11:
590 divided by 87 is 6 with a remainder of 68.
Put 6 as the next digit of the answer. 
Result so far: 7930.26436
Subtract 522 from 590 to get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Advancing to step 12:
680 divided by 87 is 7 with a remainder of 71.
Put 7 as the next digit of the answer. 
Result so far: 7930.264367
Subtracting 609 from 680 leaves us with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Advancing to step 13:
710 divided by 87 is 8 with a remainder of 14.
Put 8 as the next digit of the answer. 
Result so far: 7930.2643678
If we subtract 696 from 710, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 14:
87 goes into 140 1 times with a remainder of 53.
The number 1 becomes the next digit in our result. 
Result so far: 7930.26436781
Subtracting 87 from 140 leaves us with 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

The final outcome is 7930.26436781, with a leftover of 5.3e-08.