We're dividing 79486941 by 621 
The aim is to understand the frequency of 621 in 79486941.

Moving on to step 1:
When dividing 7 by 621, we get 0 with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Append the next digit (9) from the dividend to 7 and continue with: 79 / 621

Going ahead to step 2:
621 goes into 79 0 times with a remainder of 79.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 79, we get 79.
Include the next digit (4) from the dividend after 79, then repeat: 794 / 621

Moving on to step 3:
621 goes into 794 1 times with a remainder of 173.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 621 from 794 to get 173.
Include the next digit (8) from the dividend after 173, then repeat: 1738 / 621

On to step 4:
The number 621 fits into 1738 2 times, leaving a remainder of 496.
The next digit of our result is 2. 
Result so far: 12.0
Subtract 1242 from 1738 to get 496.
Append the next digit (6) from the dividend to 496 and continue with: 4966 / 621

Advancing to step 5:
621 can be fit into 4966 7 times, resulting in a remainder of 619.
Record the quotient 7 as the next digit in the result. 
Result so far: 127.0
If we take 4347 away from 4966, we end up with 619.
Grab the next digit (9) from the dividend, add it to 619, then carry on: 6199 / 621

On to step 6:
The number 621 fits into 6199 9 times, leaving a remainder of 610.
Use 9 as the next digit of our solution. 
Result so far: 1279.0
If we take 5589 away from 6199, we end up with 610.
Include the next digit (4) from the dividend after 610, then repeat: 6104 / 621

Going ahead to step 7:
The number 621 fits into 6104 9 times, leaving a remainder of 515.
The next digit of our result is 9. 
Result so far: 12799.0
Deduct 5589 from 6104 and we're left with 515.
Grab the next digit (1) from the dividend, add it to 515, then carry on: 5151 / 621

Let's proceed to step 8:
If we divide 5151 by 621, we get 8 and a remainder of 183.
The number 8 becomes the next digit in our result. 
Result so far: 127998.0
If we subtract 4968 from 5151, we get 183.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1830, and continue the process.

Moving on to step 9:
621 goes into 1830 2 times with a remainder of 588.
The number 2 becomes the next digit in our result. 
Result so far: 127998.2
Subtract 1242 from 1830 to get 588.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5880, and continue the process.

Moving on to step 10:
621 goes into 5880 9 times with a remainder of 291.
Use 9 as the next digit of our solution. 
Result so far: 127998.29
Deduct 5589 from 5880 and we're left with 291.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2910, and continue the process.

On to step 11:
621 can be fit into 2910 4 times, resulting in a remainder of 426.
Record the quotient 4 as the next digit in the result. 
Result so far: 127998.294
If we take 2484 away from 2910, we end up with 426.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4260, and continue the process.

Step 12:
When dividing 4260 by 621, we get 6 with a remainder of 534.
Use 6 as the next digit of our solution. 
Result so far: 127998.2946
The remainder is 534 after subtracting 3726 from 4260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5340, and continue the process.

Going ahead to step 13:
5340 divided by 621 is 8 with a remainder of 372.
Record the quotient 8 as the next digit in the result. 
Result so far: 127998.29468
Subtract 4968 from 5340 to get 372.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3720, and continue the process.

Moving on to step 14:
621 goes into 3720 5 times with a remainder of 615.
The next digit of our result is 5. 
Result so far: 127998.294685
If we subtract 3105 from 3720, we get 615.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6150, and continue the process.

On to step 15:
6150 divided by 621 is 9 with a remainder of 561.
Put 9 as the next digit of the answer. 
Result so far: 127998.2946859
If we subtract 5589 from 6150, we get 561.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5610, and continue the process.

Going ahead to step 16:
The number 621 fits into 5610 9 times, leaving a remainder of 21.
Record the quotient 9 as the next digit in the result. 
Result so far: 127998.29468599
If we take 5589 away from 5610, we end up with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

The quotient of the division is 127998.29468599, and the remainder is 2.1e-08.