Let's divide 48937355 by 621
The aim is to understand the frequency of 621 in 48937355.

Moving on to step 1:
If we divide 4 by 621, we get 0 and a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Take the next digit (8) from the dividend and append it to 4, then repeat: 48 / 621

Going ahead to step 2:
621 can be fit into 48 0 times, resulting in a remainder of 48.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 48 after subtracting 0 from 48.
Include the next digit (9) from the dividend after 48, then repeat: 489 / 621

Moving on to step 3:
489 divided by 621 is 0 with a remainder of 489.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 489 and we're left with 489.
Include the next digit (3) from the dividend after 489, then repeat: 4893 / 621

Going ahead to step 4:
The number 621 fits into 4893 7 times, leaving a remainder of 546.
The next digit of our result is 7. 
Result so far: 7.0
The remainder is 546 after subtracting 4347 from 4893.
Bring next digit (7) of the dividend behind the 546 and repeat the process: 5467 / 621

Going ahead to step 5:
5467 divided by 621 is 8 with a remainder of 499.
Record the quotient 8 as the next digit in the result. 
Result so far: 78.0
Subtracting 4968 from 5467 leaves us with 499.
Include the next digit (3) from the dividend after 499, then repeat: 4993 / 621

Going ahead to step 6:
621 can be fit into 4993 8 times, resulting in a remainder of 25.
The next digit of our result is 8. 
Result so far: 788.0
If we subtract 4968 from 4993, we get 25.
Append the next digit (5) from the dividend to 25 and continue with: 255 / 621

Moving on to step 7:
If we divide 255 by 621, we get 0 and a remainder of 255.
Use 0 as the next digit of our solution. 
Result so far: 7880.0
Deduct 0 from 255 and we're left with 255.
Bring next digit (5) of the dividend behind the 255 and repeat the process: 2555 / 621

Step 8:
2555 divided by 621 is 4 with a remainder of 71.
The number 4 becomes the next digit in our result. 
Result so far: 78804.0
Subtracting 2484 from 2555 leaves us with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Step 9:
The number 621 fits into 710 1 times, leaving a remainder of 89.
Use 1 as the next digit of our solution. 
Result so far: 78804.1
Subtract 621 from 710 to get 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

On to step 10:
The number 621 fits into 890 1 times, leaving a remainder of 269.
Write down 1 as next digit of the result. 
Result so far: 78804.11
Deduct 621 from 890 and we're left with 269.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2690, and continue the process.

The quotient of the division is 78804.11, and the remainder is 0.269.