6122913 ÷ 648 
The aim is to understand the frequency of 648 in 6122913.

Step 1:
648 can be fit into 6 0 times, resulting in a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Fetch the next digit (1) from the dividend, attach it to 6 and continue: 61 / 648

On to step 2:
The number 648 fits into 61 0 times, leaving a remainder of 61.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 61, we end up with 61.
Grab the next digit (2) from the dividend, add it to 61, then carry on: 612 / 648

On to step 3:
648 goes into 612 0 times with a remainder of 612.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 612, we end up with 612.
Take the next digit (2) from the dividend and append it to 612, then repeat: 6122 / 648

Let's proceed to step 4:
648 can be fit into 6122 9 times, resulting in a remainder of 290.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
If we subtract 5832 from 6122, we get 290.
Bring next digit (9) of the dividend behind the 290 and repeat the process: 2909 / 648

Moving on to step 5:
648 can be fit into 2909 4 times, resulting in a remainder of 317.
Put 4 as the next digit of the answer. 
Result so far: 94.0
If we subtract 2592 from 2909, we get 317.
Append the next digit (1) from the dividend to 317 and continue with: 3171 / 648

Moving on to step 6:
3171 divided by 648 is 4 with a remainder of 579.
Use 4 as the next digit of our solution. 
Result so far: 944.0
Subtracting 2592 from 3171 leaves us with 579.
Append the next digit (3) from the dividend to 579 and continue with: 5793 / 648

Let's proceed to step 7:
When dividing 5793 by 648, we get 8 with a remainder of 609.
Put 8 as the next digit of the answer. 
Result so far: 9448.0
Subtract 5184 from 5793 to get 609.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6090, and continue the process.

Moving on to step 8:
When dividing 6090 by 648, we get 9 with a remainder of 258.
Use 9 as the next digit of our solution. 
Result so far: 9448.9
Subtracting 5832 from 6090 leaves us with 258.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2580, and continue the process.

Let's proceed to step 9:
2580 divided by 648 is 3 with a remainder of 636.
The next digit of our result is 3. 
Result so far: 9448.93
If we subtract 1944 from 2580, we get 636.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6360, and continue the process.

Moving on to step 10:
When dividing 6360 by 648, we get 9 with a remainder of 528.
Use 9 as the next digit of our solution. 
Result so far: 9448.939
If we take 5832 away from 6360, we end up with 528.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5280, and continue the process.

On to step 11:
The number 648 fits into 5280 8 times, leaving a remainder of 96.
The next digit of our result is 8. 
Result so far: 9448.9398
Subtract 5184 from 5280 to get 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

On to step 12:
The number 648 fits into 960 1 times, leaving a remainder of 312.
The next digit of our result is 1. 
Result so far: 9448.93981
Deduct 648 from 960 and we're left with 312.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3120, and continue the process.

On to step 13:
648 goes into 3120 4 times with a remainder of 528.
Put 4 as the next digit of the answer. 
Result so far: 9448.939814
Deduct 2592 from 3120 and we're left with 528.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5280, and continue the process.

Let's proceed to step 14:
648 can be fit into 5280 8 times, resulting in a remainder of 96.
Write down 8 as next digit of the result. 
Result so far: 9448.9398148
Deduct 5184 from 5280 and we're left with 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

Let's proceed to step 15:
When dividing 960 by 648, we get 1 with a remainder of 312.
Write down 1 as next digit of the result. 
Result so far: 9448.93981481
If we subtract 648 from 960, we get 312.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3120, and continue the process.

The final result is 9448.93981481 with a remainder of 3.12e-07.