85899291 divided by 258 
The aim is to understand the frequency of 258 in 85899291.

Advancing to step 1:
If we divide 8 by 258, we get 0 and a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Grab the next digit (5) from the dividend, add it to 8, then carry on: 85 / 258

Step 2:
258 can be fit into 85 0 times, resulting in a remainder of 85.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 85, we end up with 85.
Include the next digit (8) from the dividend after 85, then repeat: 858 / 258

Going ahead to step 3:
The number 258 fits into 858 3 times, leaving a remainder of 84.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtracting 774 from 858 leaves us with 84.
Take the next digit (9) from the dividend and append it to 84, then repeat: 849 / 258

On to step 4:
The number 258 fits into 849 3 times, leaving a remainder of 75.
Use 3 as the next digit of our solution. 
Result so far: 33.0
Deduct 774 from 849 and we're left with 75.
Grab the next digit (9) from the dividend, add it to 75, then carry on: 759 / 258

Let's proceed to step 5:
When dividing 759 by 258, we get 2 with a remainder of 243.
The next digit of our result is 2. 
Result so far: 332.0
If we subtract 516 from 759, we get 243.
Include the next digit (2) from the dividend after 243, then repeat: 2432 / 258

Going ahead to step 6:
258 goes into 2432 9 times with a remainder of 110.
Put 9 as the next digit of the answer. 
Result so far: 3329.0
The remainder is 110 after subtracting 2322 from 2432.
Take the next digit (9) from the dividend and append it to 110, then repeat: 1109 / 258

Step 7:
258 goes into 1109 4 times with a remainder of 77.
Put 4 as the next digit of the answer. 
Result so far: 33294.0
Subtract 1032 from 1109 to get 77.
Take the next digit (1) from the dividend and append it to 77, then repeat: 771 / 258

Going ahead to step 8:
The number 258 fits into 771 2 times, leaving a remainder of 255.
Put 2 as the next digit of the answer. 
Result so far: 332942.0
The remainder is 255 after subtracting 516 from 771.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2550, and continue the process.

On to step 9:
258 can be fit into 2550 9 times, resulting in a remainder of 228.
Write down 9 as next digit of the result. 
Result so far: 332942.9
Subtracting 2322 from 2550 leaves us with 228.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

Let's proceed to step 10:
258 goes into 2280 8 times with a remainder of 216.
The number 8 becomes the next digit in our result. 
Result so far: 332942.98
Subtracting 2064 from 2280 leaves us with 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

Let's proceed to step 11:
When dividing 2160 by 258, we get 8 with a remainder of 96.
Put 8 as the next digit of the answer. 
Result so far: 332942.988
Deduct 2064 from 2160 and we're left with 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

The quotient of the division is 332942.988, and the remainder is 0.0096.