We look at the division of 62113400 by 646 
The aim is to understand the frequency of 646 in 62113400.

Advancing to step 1:
646 can be fit into 6 0 times, resulting in a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Fetch the next digit (2) from the dividend, attach it to 6 and continue: 62 / 646

Let's proceed to step 2:
When dividing 62 by 646, we get 0 with a remainder of 62.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 62 leaves us with 62.
Take the next digit (1) from the dividend and append it to 62, then repeat: 621 / 646

On to step 3:
The number 646 fits into 621 0 times, leaving a remainder of 621.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 621, we get 621.
Grab the next digit (1) from the dividend, add it to 621, then carry on: 6211 / 646

Going ahead to step 4:
6211 divided by 646 is 9 with a remainder of 397.
Use 9 as the next digit of our solution. 
Result so far: 9.0
If we subtract 5814 from 6211, we get 397.
Grab the next digit (3) from the dividend, add it to 397, then carry on: 3973 / 646

Step 5:
When dividing 3973 by 646, we get 6 with a remainder of 97.
Put 6 as the next digit of the answer. 
Result so far: 96.0
Subtracting 3876 from 3973 leaves us with 97.
Grab the next digit (4) from the dividend, add it to 97, then carry on: 974 / 646

Moving on to step 6:
The number 646 fits into 974 1 times, leaving a remainder of 328.
Record the quotient 1 as the next digit in the result. 
Result so far: 961.0
If we subtract 646 from 974, we get 328.
Append the next digit (0) from the dividend to 328 and continue with: 3280 / 646

On to step 7:
If we divide 3280 by 646, we get 5 and a remainder of 50.
Put 5 as the next digit of the answer. 
Result so far: 9615.0
Subtract 3230 from 3280 to get 50.
Append the next digit (0) from the dividend to 50 and continue with: 500 / 646

Moving on to step 8:
646 can be fit into 500 0 times, resulting in a remainder of 500.
Record the quotient 0 as the next digit in the result. 
Result so far: 96150.0
Deduct 0 from 500 and we're left with 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

Going ahead to step 9:
646 can be fit into 5000 7 times, resulting in a remainder of 478.
Use 7 as the next digit of our solution. 
Result so far: 96150.7
If we take 4522 away from 5000, we end up with 478.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4780, and continue the process.

Moving on to step 10:
When dividing 4780 by 646, we get 7 with a remainder of 258.
Use 7 as the next digit of our solution. 
Result so far: 96150.77
The remainder is 258 after subtracting 4522 from 4780.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2580, and continue the process.

After the division, we end up with 96150.77 and a remainder of 0.258.