We look at the division of 90072156 by 545 
The aim is to understand the frequency of 545 in 90072156.

Going ahead to step 1:
545 can be fit into 9 0 times, resulting in a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Grab the next digit (0) from the dividend, add it to 9, then carry on: 90 / 545

Moving on to step 2:
90 divided by 545 is 0 with a remainder of 90.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 90, we end up with 90.
Grab the next digit (0) from the dividend, add it to 90, then carry on: 900 / 545

Advancing to step 3:
545 can be fit into 900 1 times, resulting in a remainder of 355.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 545 from 900 to get 355.
Grab the next digit (7) from the dividend, add it to 355, then carry on: 3557 / 545

Advancing to step 4:
The number 545 fits into 3557 6 times, leaving a remainder of 287.
Write down 6 as next digit of the result. 
Result so far: 16.0
Subtracting 3270 from 3557 leaves us with 287.
Bring next digit (2) of the dividend behind the 287 and repeat the process: 2872 / 545

Advancing to step 5:
545 can be fit into 2872 5 times, resulting in a remainder of 147.
Record the quotient 5 as the next digit in the result. 
Result so far: 165.0
The remainder is 147 after subtracting 2725 from 2872.
Grab the next digit (1) from the dividend, add it to 147, then carry on: 1471 / 545

Step 6:
545 can be fit into 1471 2 times, resulting in a remainder of 381.
The next digit of our result is 2. 
Result so far: 1652.0
The remainder is 381 after subtracting 1090 from 1471.
Take the next digit (5) from the dividend and append it to 381, then repeat: 3815 / 545

On to step 7:
The number 545 fits into 3815 7 times, leaving a remainder of 0.
The next digit of our result is 7. 
Result so far: 16527.0
Subtracting 3815 from 3815 leaves us with 0.
Grab the next digit (6) from the dividend, add it to 0, then carry on: 6 / 545

Moving on to step 8:
545 goes into 6 0 times with a remainder of 6.
The next digit of our result is 0. 
Result so far: 165270.0
The remainder is 6 after subtracting 0 from 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 9:
When dividing 60 by 545, we get 0 with a remainder of 60.
Write down 0 as next digit of the result. 
Result so far: 165270.0
If we take 0 away from 60, we end up with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 10:
545 goes into 600 1 times with a remainder of 55.
The next digit of our result is 1. 
Result so far: 165270.01
Subtracting 545 from 600 leaves us with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

On to step 11:
545 goes into 550 1 times with a remainder of 5.
Use 1 as the next digit of our solution. 
Result so far: 165270.011
If we subtract 545 from 550, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

After the division, we end up with 165270.011 and a remainder of 0.0005.