191429 ÷ 87 
The aim is to understand the frequency of 87 in 191429.

Advancing to step 1:
87 goes into 1 0 times with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Take the next digit (9) from the dividend and append it to 1, then repeat: 19 / 87

Moving on to step 2:
19 divided by 87 is 0 with a remainder of 19.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 19, we get 19.
Grab the next digit (1) from the dividend, add it to 19, then carry on: 191 / 87

On to step 3:
87 can be fit into 191 2 times, resulting in a remainder of 17.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we take 174 away from 191, we end up with 17.
Bring next digit (4) of the dividend behind the 17 and repeat the process: 174 / 87

Advancing to step 4:
If we divide 174 by 87, we get 2 and a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 22.0
If we take 174 away from 174, we end up with 0.
Bring next digit (2) of the dividend behind the 0 and repeat the process: 2 / 87

Let's proceed to step 5:
87 goes into 2 0 times with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 220.0
If we subtract 0 from 2, we get 2.
Grab the next digit (9) from the dividend, add it to 2, then carry on: 29 / 87

Moving on to step 6:
The number 87 fits into 29 0 times, leaving a remainder of 29.
Write down 0 as next digit of the result. 
Result so far: 2200.0
The remainder is 29 after subtracting 0 from 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

On to step 7:
290 divided by 87 is 3 with a remainder of 29.
Record the quotient 3 as the next digit in the result. 
Result so far: 2200.3
If we subtract 261 from 290, we get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Moving on to step 8:
290 divided by 87 is 3 with a remainder of 29.
Put 3 as the next digit of the answer. 
Result so far: 2200.33
Subtracting 261 from 290 leaves us with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

The final result is 2200.33 with a remainder of 0.029.