84255071 ÷ 145 
The aim is to understand the frequency of 145 in 84255071.

On to step 1:
If we divide 8 by 145, we get 0 and a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Bring next digit (4) of the dividend behind the 8 and repeat the process: 84 / 145

Advancing to step 2:
145 goes into 84 0 times with a remainder of 84.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 84 after subtracting 0 from 84.
Bring next digit (2) of the dividend behind the 84 and repeat the process: 842 / 145

Let's proceed to step 3:
145 can be fit into 842 5 times, resulting in a remainder of 117.
Write down 5 as next digit of the result. 
Result so far: 5.0
If we take 725 away from 842, we end up with 117.
Bring next digit (5) of the dividend behind the 117 and repeat the process: 1175 / 145

Moving on to step 4:
If we divide 1175 by 145, we get 8 and a remainder of 15.
The number 8 becomes the next digit in our result. 
Result so far: 58.0
If we take 1160 away from 1175, we end up with 15.
Fetch the next digit (5) from the dividend, attach it to 15 and continue: 155 / 145

On to step 5:
155 divided by 145 is 1 with a remainder of 10.
Use 1 as the next digit of our solution. 
Result so far: 581.0
The remainder is 10 after subtracting 145 from 155.
Grab the next digit (0) from the dividend, add it to 10, then carry on: 100 / 145

Moving on to step 6:
145 goes into 100 0 times with a remainder of 100.
Put 0 as the next digit of the answer. 
Result so far: 5810.0
Deduct 0 from 100 and we're left with 100.
Take the next digit (7) from the dividend and append it to 100, then repeat: 1007 / 145

On to step 7:
145 goes into 1007 6 times with a remainder of 137.
Put 6 as the next digit of the answer. 
Result so far: 58106.0
The remainder is 137 after subtracting 870 from 1007.
Append the next digit (1) from the dividend to 137 and continue with: 1371 / 145

Moving on to step 8:
1371 divided by 145 is 9 with a remainder of 66.
Record the quotient 9 as the next digit in the result. 
Result so far: 581069.0
The remainder is 66 after subtracting 1305 from 1371.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Advancing to step 9:
When dividing 660 by 145, we get 4 with a remainder of 80.
The next digit of our result is 4. 
Result so far: 581069.4
Subtract 580 from 660 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 10:
The number 145 fits into 800 5 times, leaving a remainder of 75.
Record the quotient 5 as the next digit in the result. 
Result so far: 581069.45
Deduct 725 from 800 and we're left with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Moving on to step 11:
145 goes into 750 5 times with a remainder of 25.
The number 5 becomes the next digit in our result. 
Result so far: 581069.455
Deduct 725 from 750 and we're left with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

After the division, we end up with 581069.455 and a remainder of 0.0025.