We divide 641592 by 45
The aim is to understand the frequency of 45 in 641592.

Advancing to step 1:
The number 45 fits into 6 0 times, leaving a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 45

Step 2:
The number 45 fits into 64 1 times, leaving a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 45 from 64 and we're left with 19.
Include the next digit (1) from the dividend after 19, then repeat: 191 / 45

On to step 3:
The number 45 fits into 191 4 times, leaving a remainder of 11.
Put 4 as the next digit of the answer. 
Result so far: 14.0
The remainder is 11 after subtracting 180 from 191.
Bring next digit (5) of the dividend behind the 11 and repeat the process: 115 / 45

Moving on to step 4:
If we divide 115 by 45, we get 2 and a remainder of 25.
Record the quotient 2 as the next digit in the result. 
Result so far: 142.0
If we subtract 90 from 115, we get 25.
Take the next digit (9) from the dividend and append it to 25, then repeat: 259 / 45

Step 5:
If we divide 259 by 45, we get 5 and a remainder of 34.
Write down 5 as next digit of the result. 
Result so far: 1425.0
If we take 225 away from 259, we end up with 34.
Take the next digit (2) from the dividend and append it to 34, then repeat: 342 / 45

Step 6:
When dividing 342 by 45, we get 7 with a remainder of 27.
Write down 7 as next digit of the result. 
Result so far: 14257.0
If we subtract 315 from 342, we get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Going ahead to step 7:
If we divide 270 by 45, we get 6 and a remainder of 0.
Put 6 as the next digit of the answer. 
Result so far: 14257.6
If we take 270 away from 270, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 8:
The number 45 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 14257.6
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 9:
When dividing 0 by 45, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 14257.6
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 14257.6, with a leftover of 0.0.