We look at the division of 329778 by 87 
The aim is to understand the frequency of 87 in 329778.

Advancing to step 1:
87 goes into 3 0 times with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Bring next digit (2) of the dividend behind the 3 and repeat the process: 32 / 87

On to step 2:
The number 87 fits into 32 0 times, leaving a remainder of 32.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 32 leaves us with 32.
Take the next digit (9) from the dividend and append it to 32, then repeat: 329 / 87

On to step 3:
If we divide 329 by 87, we get 3 and a remainder of 68.
Use 3 as the next digit of our solution. 
Result so far: 3.0
The remainder is 68 after subtracting 261 from 329.
Take the next digit (7) from the dividend and append it to 68, then repeat: 687 / 87

Moving on to step 4:
87 can be fit into 687 7 times, resulting in a remainder of 78.
Use 7 as the next digit of our solution. 
Result so far: 37.0
Deduct 609 from 687 and we're left with 78.
Bring next digit (7) of the dividend behind the 78 and repeat the process: 787 / 87

Moving on to step 5:
If we divide 787 by 87, we get 9 and a remainder of 4.
Write down 9 as next digit of the result. 
Result so far: 379.0
If we subtract 783 from 787, we get 4.
Include the next digit (8) from the dividend after 4, then repeat: 48 / 87

Advancing to step 6:
The number 87 fits into 48 0 times, leaving a remainder of 48.
Record the quotient 0 as the next digit in the result. 
Result so far: 3790.0
Subtract 0 from 48 to get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Going ahead to step 7:
When dividing 480 by 87, we get 5 with a remainder of 45.
Write down 5 as next digit of the result. 
Result so far: 3790.5
Deduct 435 from 480 and we're left with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Moving on to step 8:
When dividing 450 by 87, we get 5 with a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 3790.55
If we take 435 away from 450, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

The final outcome is 3790.55, with a leftover of 0.015.