Let's divide 6185120 by 645
The aim is to understand the frequency of 645 in 6185120.

Step 1:
645 goes into 6 0 times with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Include the next digit (1) from the dividend after 6, then repeat: 61 / 645

Moving on to step 2:
If we divide 61 by 645, we get 0 and a remainder of 61.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 61, we get 61.
Append the next digit (8) from the dividend to 61 and continue with: 618 / 645

Moving on to step 3:
When dividing 618 by 645, we get 0 with a remainder of 618.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 618 to get 618.
Fetch the next digit (5) from the dividend, attach it to 618 and continue: 6185 / 645

Advancing to step 4:
When dividing 6185 by 645, we get 9 with a remainder of 380.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
Subtract 5805 from 6185 to get 380.
Include the next digit (1) from the dividend after 380, then repeat: 3801 / 645

Let's proceed to step 5:
When dividing 3801 by 645, we get 5 with a remainder of 576.
Record the quotient 5 as the next digit in the result. 
Result so far: 95.0
Deduct 3225 from 3801 and we're left with 576.
Take the next digit (2) from the dividend and append it to 576, then repeat: 5762 / 645

Moving on to step 6:
645 goes into 5762 8 times with a remainder of 602.
Use 8 as the next digit of our solution. 
Result so far: 958.0
The remainder is 602 after subtracting 5160 from 5762.
Append the next digit (0) from the dividend to 602 and continue with: 6020 / 645

Moving on to step 7:
6020 divided by 645 is 9 with a remainder of 215.
The next digit of our result is 9. 
Result so far: 9589.0
The remainder is 215 after subtracting 5805 from 6020.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2150, and continue the process.

Moving on to step 8:
2150 divided by 645 is 3 with a remainder of 215.
The next digit of our result is 3. 
Result so far: 9589.3
If we take 1935 away from 2150, we end up with 215.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2150, and continue the process.

Step 9:
645 goes into 2150 3 times with a remainder of 215.
The number 3 becomes the next digit in our result. 
Result so far: 9589.33
Subtracting 1935 from 2150 leaves us with 215.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2150, and continue the process.

The final outcome is 9589.33, with a leftover of 0.215.