We're dividing 49589392 by 621 
The aim is to understand the frequency of 621 in 49589392.

Let's proceed to step 1:
When dividing 4 by 621, we get 0 with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Include the next digit (9) from the dividend after 4, then repeat: 49 / 621

Let's proceed to step 2:
If we divide 49 by 621, we get 0 and a remainder of 49.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 49 leaves us with 49.
Bring next digit (5) of the dividend behind the 49 and repeat the process: 495 / 621

On to step 3:
When dividing 495 by 621, we get 0 with a remainder of 495.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 495 and we're left with 495.
Fetch the next digit (8) from the dividend, attach it to 495 and continue: 4958 / 621

Advancing to step 4:
When dividing 4958 by 621, we get 7 with a remainder of 611.
Write down 7 as next digit of the result. 
Result so far: 7.0
The remainder is 611 after subtracting 4347 from 4958.
Append the next digit (9) from the dividend to 611 and continue with: 6119 / 621

Let's proceed to step 5:
6119 divided by 621 is 9 with a remainder of 530.
Record the quotient 9 as the next digit in the result. 
Result so far: 79.0
If we subtract 5589 from 6119, we get 530.
Grab the next digit (3) from the dividend, add it to 530, then carry on: 5303 / 621

On to step 6:
5303 divided by 621 is 8 with a remainder of 335.
The next digit of our result is 8. 
Result so far: 798.0
Deduct 4968 from 5303 and we're left with 335.
Grab the next digit (9) from the dividend, add it to 335, then carry on: 3359 / 621

Step 7:
621 can be fit into 3359 5 times, resulting in a remainder of 254.
The next digit of our result is 5. 
Result so far: 7985.0
If we subtract 3105 from 3359, we get 254.
Include the next digit (2) from the dividend after 254, then repeat: 2542 / 621

Advancing to step 8:
621 can be fit into 2542 4 times, resulting in a remainder of 58.
The number 4 becomes the next digit in our result. 
Result so far: 79854.0
The remainder is 58 after subtracting 2484 from 2542.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Advancing to step 9:
The number 621 fits into 580 0 times, leaving a remainder of 580.
Put 0 as the next digit of the answer. 
Result so far: 79854.0
The remainder is 580 after subtracting 0 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5800, and continue the process.

On to step 10:
621 can be fit into 5800 9 times, resulting in a remainder of 211.
The next digit of our result is 9. 
Result so far: 79854.09
Subtract 5589 from 5800 to get 211.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2110, and continue the process.

Going ahead to step 11:
When dividing 2110 by 621, we get 3 with a remainder of 247.
Write down 3 as next digit of the result. 
Result so far: 79854.093
If we take 1863 away from 2110, we end up with 247.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2470, and continue the process.

Advancing to step 12:
When dividing 2470 by 621, we get 3 with a remainder of 607.
Put 3 as the next digit of the answer. 
Result so far: 79854.0933
If we subtract 1863 from 2470, we get 607.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6070, and continue the process.

After the division, we end up with 79854.0933 and a remainder of 0.00607.