We look at the division of 354148 by 87 
The aim is to understand the frequency of 87 in 354148.

Let's proceed to step 1:
87 can be fit into 3 0 times, resulting in a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Grab the next digit (5) from the dividend, add it to 3, then carry on: 35 / 87

Going ahead to step 2:
87 can be fit into 35 0 times, resulting in a remainder of 35.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 35 after subtracting 0 from 35.
Append the next digit (4) from the dividend to 35 and continue with: 354 / 87

Moving on to step 3:
The number 87 fits into 354 4 times, leaving a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Subtracting 348 from 354 leaves us with 6.
Append the next digit (1) from the dividend to 6 and continue with: 61 / 87

Advancing to step 4:
87 can be fit into 61 0 times, resulting in a remainder of 61.
Write down 0 as next digit of the result. 
Result so far: 40.0
Subtract 0 from 61 to get 61.
Append the next digit (4) from the dividend to 61 and continue with: 614 / 87

Moving on to step 5:
If we divide 614 by 87, we get 7 and a remainder of 5.
The next digit of our result is 7. 
Result so far: 407.0
Subtracting 609 from 614 leaves us with 5.
Include the next digit (8) from the dividend after 5, then repeat: 58 / 87

Moving on to step 6:
The number 87 fits into 58 0 times, leaving a remainder of 58.
Use 0 as the next digit of our solution. 
Result so far: 4070.0
Subtracting 0 from 58 leaves us with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Advancing to step 7:
The number 87 fits into 580 6 times, leaving a remainder of 58.
The number 6 becomes the next digit in our result. 
Result so far: 4070.6
Subtracting 522 from 580 leaves us with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Let's proceed to step 8:
87 can be fit into 580 6 times, resulting in a remainder of 58.
Use 6 as the next digit of our solution. 
Result so far: 4070.66
The remainder is 58 after subtracting 522 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

The final outcome is 4070.66, with a leftover of 0.058.