258122 ÷ 71 
The aim is to understand the frequency of 71 in 258122.

Moving on to step 1:
2 divided by 71 is 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Bring next digit (5) of the dividend behind the 2 and repeat the process: 25 / 71

On to step 2:
25 divided by 71 is 0 with a remainder of 25.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 25, we get 25.
Include the next digit (8) from the dividend after 25, then repeat: 258 / 71

Going ahead to step 3:
258 divided by 71 is 3 with a remainder of 45.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Subtract 213 from 258 to get 45.
Append the next digit (1) from the dividend to 45 and continue with: 451 / 71

Going ahead to step 4:
71 goes into 451 6 times with a remainder of 25.
Put 6 as the next digit of the answer. 
Result so far: 36.0
Deduct 426 from 451 and we're left with 25.
Bring next digit (2) of the dividend behind the 25 and repeat the process: 252 / 71

Let's proceed to step 5:
When dividing 252 by 71, we get 3 with a remainder of 39.
Record the quotient 3 as the next digit in the result. 
Result so far: 363.0
The remainder is 39 after subtracting 213 from 252.
Take the next digit (2) from the dividend and append it to 39, then repeat: 392 / 71

Moving on to step 6:
71 can be fit into 392 5 times, resulting in a remainder of 37.
Use 5 as the next digit of our solution. 
Result so far: 3635.0
If we take 355 away from 392, we end up with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

On to step 7:
71 can be fit into 370 5 times, resulting in a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 3635.5
The remainder is 15 after subtracting 355 from 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 8:
The number 71 fits into 150 2 times, leaving a remainder of 8.
The next digit of our result is 2. 
Result so far: 3635.52
The remainder is 8 after subtracting 142 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 9:
When dividing 80 by 71, we get 1 with a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 3635.521
If we take 71 away from 80, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 10:
90 divided by 71 is 1 with a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 3635.5211
Deduct 71 from 90 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

The quotient of the division is 3635.5211, and the remainder is 0.00019.