12596234 ÷ 321 
The aim is to understand the frequency of 321 in 12596234.

Moving on to step 1:
321 goes into 1 0 times with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 321

On to step 2:
If we divide 12 by 321, we get 0 and a remainder of 12.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Fetch the next digit (5) from the dividend, attach it to 12 and continue: 125 / 321

Going ahead to step 3:
321 can be fit into 125 0 times, resulting in a remainder of 125.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 125, we get 125.
Fetch the next digit (9) from the dividend, attach it to 125 and continue: 1259 / 321

On to step 4:
1259 divided by 321 is 3 with a remainder of 296.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtracting 963 from 1259 leaves us with 296.
Grab the next digit (6) from the dividend, add it to 296, then carry on: 2966 / 321

Advancing to step 5:
If we divide 2966 by 321, we get 9 and a remainder of 77.
Use 9 as the next digit of our solution. 
Result so far: 39.0
Deduct 2889 from 2966 and we're left with 77.
Take the next digit (2) from the dividend and append it to 77, then repeat: 772 / 321

Let's proceed to step 6:
321 can be fit into 772 2 times, resulting in a remainder of 130.
The next digit of our result is 2. 
Result so far: 392.0
If we take 642 away from 772, we end up with 130.
Bring next digit (3) of the dividend behind the 130 and repeat the process: 1303 / 321

Moving on to step 7:
1303 divided by 321 is 4 with a remainder of 19.
Put 4 as the next digit of the answer. 
Result so far: 3924.0
If we take 1284 away from 1303, we end up with 19.
Append the next digit (4) from the dividend to 19 and continue with: 194 / 321

Step 8:
321 can be fit into 194 0 times, resulting in a remainder of 194.
Write down 0 as next digit of the result. 
Result so far: 39240.0
The remainder is 194 after subtracting 0 from 194.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1940, and continue the process.

On to step 9:
When dividing 1940 by 321, we get 6 with a remainder of 14.
The next digit of our result is 6. 
Result so far: 39240.6
Deduct 1926 from 1940 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 10:
If we divide 140 by 321, we get 0 and a remainder of 140.
Use 0 as the next digit of our solution. 
Result so far: 39240.6
If we take 0 away from 140, we end up with 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Let's proceed to step 11:
321 can be fit into 1400 4 times, resulting in a remainder of 116.
The number 4 becomes the next digit in our result. 
Result so far: 39240.604
Deduct 1284 from 1400 and we're left with 116.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1160, and continue the process.

Step 12:
The number 321 fits into 1160 3 times, leaving a remainder of 197.
The number 3 becomes the next digit in our result. 
Result so far: 39240.6043
If we subtract 963 from 1160, we get 197.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1970, and continue the process.

Let's proceed to step 13:
321 can be fit into 1970 6 times, resulting in a remainder of 44.
Use 6 as the next digit of our solution. 
Result so far: 39240.60436
Subtracting 1926 from 1970 leaves us with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

On to step 14:
If we divide 440 by 321, we get 1 and a remainder of 119.
Put 1 as the next digit of the answer. 
Result so far: 39240.604361
Deduct 321 from 440 and we're left with 119.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1190, and continue the process.

On to step 15:
When dividing 1190 by 321, we get 3 with a remainder of 227.
Use 3 as the next digit of our solution. 
Result so far: 39240.6043613
The remainder is 227 after subtracting 963 from 1190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2270, and continue the process.

Let's proceed to step 16:
2270 divided by 321 is 7 with a remainder of 23.
Put 7 as the next digit of the answer. 
Result so far: 39240.60436137
The remainder is 23 after subtracting 2247 from 2270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

In conclusion, the division gives 39240.60436137 with a balance of 2.3e-08.