45154124 divided by 45 
The aim is to understand the frequency of 45 in 45154124.

On to step 1:
The number 45 fits into 4 0 times, leaving a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Include the next digit (5) from the dividend after 4, then repeat: 45 / 45

Step 2:
45 goes into 45 1 times with a remainder of 0.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 45 away from 45, we end up with 0.
Append the next digit (1) from the dividend to 0 and continue with: 1 / 45

Step 3:
45 can be fit into 1 0 times, resulting in a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 10.0
If we subtract 0 from 1, we get 1.
Append the next digit (5) from the dividend to 1 and continue with: 15 / 45

On to step 4:
45 can be fit into 15 0 times, resulting in a remainder of 15.
Record the quotient 0 as the next digit in the result. 
Result so far: 100.0
Deduct 0 from 15 and we're left with 15.
Take the next digit (4) from the dividend and append it to 15, then repeat: 154 / 45

Advancing to step 5:
45 goes into 154 3 times with a remainder of 19.
Record the quotient 3 as the next digit in the result. 
Result so far: 1003.0
The remainder is 19 after subtracting 135 from 154.
Fetch the next digit (1) from the dividend, attach it to 19 and continue: 191 / 45

Going ahead to step 6:
If we divide 191 by 45, we get 4 and a remainder of 11.
Put 4 as the next digit of the answer. 
Result so far: 10034.0
Subtracting 180 from 191 leaves us with 11.
Bring next digit (2) of the dividend behind the 11 and repeat the process: 112 / 45

Let's proceed to step 7:
112 divided by 45 is 2 with a remainder of 22.
Put 2 as the next digit of the answer. 
Result so far: 100342.0
Subtract 90 from 112 to get 22.
Fetch the next digit (4) from the dividend, attach it to 22 and continue: 224 / 45

Step 8:
45 can be fit into 224 4 times, resulting in a remainder of 44.
Write down 4 as next digit of the result. 
Result so far: 1003424.0
Deduct 180 from 224 and we're left with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Advancing to step 9:
The number 45 fits into 440 9 times, leaving a remainder of 35.
The next digit of our result is 9. 
Result so far: 1003424.9
Subtracting 405 from 440 leaves us with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Advancing to step 10:
45 can be fit into 350 7 times, resulting in a remainder of 35.
Record the quotient 7 as the next digit in the result. 
Result so far: 1003424.97
If we take 315 away from 350, we end up with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Advancing to step 11:
45 can be fit into 350 7 times, resulting in a remainder of 35.
Write down 7 as next digit of the result. 
Result so far: 1003424.977
If we take 315 away from 350, we end up with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

The final outcome is 1003424.977, with a leftover of 0.0035.