We look at the division of 221327 by 690 
The aim is to understand the frequency of 690 in 221327.

Moving on to step 1:
The number 690 fits into 2 0 times, leaving a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Bring next digit (2) of the dividend behind the 2 and repeat the process: 22 / 690

Advancing to step 2:
690 goes into 22 0 times with a remainder of 22.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 22 after subtracting 0 from 22.
Fetch the next digit (1) from the dividend, attach it to 22 and continue: 221 / 690

On to step 3:
When dividing 221 by 690, we get 0 with a remainder of 221.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 221 to get 221.
Bring next digit (3) of the dividend behind the 221 and repeat the process: 2213 / 690

Let's proceed to step 4:
2213 divided by 690 is 3 with a remainder of 143.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Deduct 2070 from 2213 and we're left with 143.
Grab the next digit (2) from the dividend, add it to 143, then carry on: 1432 / 690

Going ahead to step 5:
When dividing 1432 by 690, we get 2 with a remainder of 52.
Use 2 as the next digit of our solution. 
Result so far: 32.0
Subtract 1380 from 1432 to get 52.
Take the next digit (7) from the dividend and append it to 52, then repeat: 527 / 690

Moving on to step 6:
The number 690 fits into 527 0 times, leaving a remainder of 527.
Put 0 as the next digit of the answer. 
Result so far: 320.0
The remainder is 527 after subtracting 0 from 527.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5270, and continue the process.

Let's proceed to step 7:
The number 690 fits into 5270 7 times, leaving a remainder of 440.
Use 7 as the next digit of our solution. 
Result so far: 320.7
If we take 4830 away from 5270, we end up with 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

On to step 8:
690 goes into 4400 6 times with a remainder of 260.
The number 6 becomes the next digit in our result. 
Result so far: 320.76
The remainder is 260 after subtracting 4140 from 4400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Let's proceed to step 9:
When dividing 2600 by 690, we get 3 with a remainder of 530.
Write down 3 as next digit of the result. 
Result so far: 320.763
If we subtract 2070 from 2600, we get 530.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5300, and continue the process.

Going ahead to step 10:
690 can be fit into 5300 7 times, resulting in a remainder of 470.
The number 7 becomes the next digit in our result. 
Result so far: 320.7637
Deduct 4830 from 5300 and we're left with 470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4700, and continue the process.

Let's proceed to step 11:
When dividing 4700 by 690, we get 6 with a remainder of 560.
Write down 6 as next digit of the result. 
Result so far: 320.76376
If we subtract 4140 from 4700, we get 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

Moving on to step 12:
If we divide 5600 by 690, we get 8 and a remainder of 80.
Record the quotient 8 as the next digit in the result. 
Result so far: 320.763768
Subtract 5520 from 5600 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Let's proceed to step 13:
The number 690 fits into 800 1 times, leaving a remainder of 110.
The number 1 becomes the next digit in our result. 
Result so far: 320.7637681
The remainder is 110 after subtracting 690 from 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Step 14:
If we divide 1100 by 690, we get 1 and a remainder of 410.
The next digit of our result is 1. 
Result so far: 320.76376811
If we subtract 690 from 1100, we get 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4100, and continue the process.

The final result is 320.76376811 with a remainder of 4.1e-07.