We look at the division of 525039 by 45 
The aim is to understand the frequency of 45 in 525039.

Moving on to step 1:
If we divide 5 by 45, we get 0 and a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Grab the next digit (2) from the dividend, add it to 5, then carry on: 52 / 45

Advancing to step 2:
The number 45 fits into 52 1 times, leaving a remainder of 7.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 45 from 52 leaves us with 7.
Fetch the next digit (5) from the dividend, attach it to 7 and continue: 75 / 45

On to step 3:
75 divided by 45 is 1 with a remainder of 30.
Put 1 as the next digit of the answer. 
Result so far: 11.0
Subtract 45 from 75 to get 30.
Take the next digit (0) from the dividend and append it to 30, then repeat: 300 / 45

Going ahead to step 4:
45 goes into 300 6 times with a remainder of 30.
Put 6 as the next digit of the answer. 
Result so far: 116.0
Deduct 270 from 300 and we're left with 30.
Append the next digit (3) from the dividend to 30 and continue with: 303 / 45

Advancing to step 5:
When dividing 303 by 45, we get 6 with a remainder of 33.
Record the quotient 6 as the next digit in the result. 
Result so far: 1166.0
Subtracting 270 from 303 leaves us with 33.
Append the next digit (9) from the dividend to 33 and continue with: 339 / 45

On to step 6:
When dividing 339 by 45, we get 7 with a remainder of 24.
Put 7 as the next digit of the answer. 
Result so far: 11667.0
Deduct 315 from 339 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 7:
45 can be fit into 240 5 times, resulting in a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 11667.5
Subtract 225 from 240 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 8:
The number 45 fits into 150 3 times, leaving a remainder of 15.
The number 3 becomes the next digit in our result. 
Result so far: 11667.53
Deduct 135 from 150 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 9:
45 can be fit into 150 3 times, resulting in a remainder of 15.
The number 3 becomes the next digit in our result. 
Result so far: 11667.533
Deduct 135 from 150 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

In conclusion, the division gives 11667.533 with a balance of 0.0015.