27583087 divided by 621 
The aim is to understand the frequency of 621 in 27583087.

Going ahead to step 1:
When dividing 2 by 621, we get 0 with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Grab the next digit (7) from the dividend, add it to 2, then carry on: 27 / 621

Let's proceed to step 2:
If we divide 27 by 621, we get 0 and a remainder of 27.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 27 to get 27.
Append the next digit (5) from the dividend to 27 and continue with: 275 / 621

Let's proceed to step 3:
The number 621 fits into 275 0 times, leaving a remainder of 275.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 275 leaves us with 275.
Include the next digit (8) from the dividend after 275, then repeat: 2758 / 621

Moving on to step 4:
2758 divided by 621 is 4 with a remainder of 274.
Put 4 as the next digit of the answer. 
Result so far: 4.0
The remainder is 274 after subtracting 2484 from 2758.
Bring next digit (3) of the dividend behind the 274 and repeat the process: 2743 / 621

Going ahead to step 5:
621 can be fit into 2743 4 times, resulting in a remainder of 259.
Write down 4 as next digit of the result. 
Result so far: 44.0
If we take 2484 away from 2743, we end up with 259.
Append the next digit (0) from the dividend to 259 and continue with: 2590 / 621

Let's proceed to step 6:
If we divide 2590 by 621, we get 4 and a remainder of 106.
Put 4 as the next digit of the answer. 
Result so far: 444.0
Subtract 2484 from 2590 to get 106.
Grab the next digit (8) from the dividend, add it to 106, then carry on: 1068 / 621

Moving on to step 7:
621 can be fit into 1068 1 times, resulting in a remainder of 447.
The next digit of our result is 1. 
Result so far: 4441.0
Subtract 621 from 1068 to get 447.
Fetch the next digit (7) from the dividend, attach it to 447 and continue: 4477 / 621

Advancing to step 8:
621 goes into 4477 7 times with a remainder of 130.
Put 7 as the next digit of the answer. 
Result so far: 44417.0
Deduct 4347 from 4477 and we're left with 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Step 9:
621 goes into 1300 2 times with a remainder of 58.
The next digit of our result is 2. 
Result so far: 44417.2
Deduct 1242 from 1300 and we're left with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Let's proceed to step 10:
The number 621 fits into 580 0 times, leaving a remainder of 580.
Record the quotient 0 as the next digit in the result. 
Result so far: 44417.2
Subtract 0 from 580 to get 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5800, and continue the process.

Moving on to step 11:
621 can be fit into 5800 9 times, resulting in a remainder of 211.
Put 9 as the next digit of the answer. 
Result so far: 44417.209
The remainder is 211 after subtracting 5589 from 5800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2110, and continue the process.

Moving on to step 12:
If we divide 2110 by 621, we get 3 and a remainder of 247.
Record the quotient 3 as the next digit in the result. 
Result so far: 44417.2093
Subtract 1863 from 2110 to get 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 13:
621 can be fit into 2470 3 times, resulting in a remainder of 607.
The number 3 becomes the next digit in our result. 
Result so far: 44417.20933
Subtracting 1863 from 2470 leaves us with 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 44417.20933 and a remainder of 0.000607.