650042 ÷ 45 
The aim is to understand the frequency of 45 in 650042.

On to step 1:
If we divide 6 by 45, we get 0 and a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Append the next digit (5) from the dividend to 6 and continue with: 65 / 45

Going ahead to step 2:
If we divide 65 by 45, we get 1 and a remainder of 20.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 45 from 65 and we're left with 20.
Append the next digit (0) from the dividend to 20 and continue with: 200 / 45

Moving on to step 3:
45 goes into 200 4 times with a remainder of 20.
The next digit of our result is 4. 
Result so far: 14.0
If we subtract 180 from 200, we get 20.
Bring next digit (0) of the dividend behind the 20 and repeat the process: 200 / 45

Moving on to step 4:
When dividing 200 by 45, we get 4 with a remainder of 20.
Use 4 as the next digit of our solution. 
Result so far: 144.0
Subtracting 180 from 200 leaves us with 20.
Append the next digit (4) from the dividend to 20 and continue with: 204 / 45

Advancing to step 5:
If we divide 204 by 45, we get 4 and a remainder of 24.
The next digit of our result is 4. 
Result so far: 1444.0
If we take 180 away from 204, we end up with 24.
Grab the next digit (2) from the dividend, add it to 24, then carry on: 242 / 45

Going ahead to step 6:
242 divided by 45 is 5 with a remainder of 17.
Write down 5 as next digit of the result. 
Result so far: 14445.0
Subtract 225 from 242 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Going ahead to step 7:
170 divided by 45 is 3 with a remainder of 35.
The next digit of our result is 3. 
Result so far: 14445.3
Subtract 135 from 170 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

On to step 8:
350 divided by 45 is 7 with a remainder of 35.
The next digit of our result is 7. 
Result so far: 14445.37
If we subtract 315 from 350, we get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Going ahead to step 9:
45 goes into 350 7 times with a remainder of 35.
Put 7 as the next digit of the answer. 
Result so far: 14445.377
Deduct 315 from 350 and we're left 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 quotient of the division is 14445.377, and the remainder is 0.0035.