Let's divide 21941903 by 312
The aim is to understand the frequency of 312 in 21941903.

Let's proceed to step 1:
When dividing 2 by 312, we get 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 312

On to step 2:
312 can be fit into 21 0 times, resulting in a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 21, we end up with 21.
Take the next digit (9) from the dividend and append it to 21, then repeat: 219 / 312

Going ahead to step 3:
219 divided by 312 is 0 with a remainder of 219.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 219, we get 219.
Append the next digit (4) from the dividend to 219 and continue with: 2194 / 312

On to step 4:
If we divide 2194 by 312, we get 7 and a remainder of 10.
Put 7 as the next digit of the answer. 
Result so far: 7.0
If we subtract 2184 from 2194, we get 10.
Fetch the next digit (1) from the dividend, attach it to 10 and continue: 101 / 312

Moving on to step 5:
The number 312 fits into 101 0 times, leaving a remainder of 101.
Put 0 as the next digit of the answer. 
Result so far: 70.0
The remainder is 101 after subtracting 0 from 101.
Include the next digit (9) from the dividend after 101, then repeat: 1019 / 312

Step 6:
1019 divided by 312 is 3 with a remainder of 83.
Record the quotient 3 as the next digit in the result. 
Result so far: 703.0
The remainder is 83 after subtracting 936 from 1019.
Include the next digit (0) from the dividend after 83, then repeat: 830 / 312

Going ahead to step 7:
830 divided by 312 is 2 with a remainder of 206.
The next digit of our result is 2. 
Result so far: 7032.0
Deduct 624 from 830 and we're left with 206.
Grab the next digit (3) from the dividend, add it to 206, then carry on: 2063 / 312

Moving on to step 8:
312 can be fit into 2063 6 times, resulting in a remainder of 191.
Put 6 as the next digit of the answer. 
Result so far: 70326.0
If we take 1872 away from 2063, we end up with 191.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1910, and continue the process.

Going ahead to step 9:
312 goes into 1910 6 times with a remainder of 38.
Put 6 as the next digit of the answer. 
Result so far: 70326.6
Subtract 1872 from 1910 to get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

On to step 10:
When dividing 380 by 312, we get 1 with a remainder of 68.
Put 1 as the next digit of the answer. 
Result so far: 70326.61
If we take 312 away from 380, we end up with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Advancing to step 11:
The number 312 fits into 680 2 times, leaving a remainder of 56.
The next digit of our result is 2. 
Result so far: 70326.612
If we subtract 624 from 680, we get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Let's proceed to step 12:
560 divided by 312 is 1 with a remainder of 248.
Put 1 as the next digit of the answer. 
Result so far: 70326.6121
If we subtract 312 from 560, we get 248.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2480, and continue the process.

Advancing to step 13:
If we divide 2480 by 312, we get 7 and a remainder of 296.
Use 7 as the next digit of our solution. 
Result so far: 70326.61217
Subtract 2184 from 2480 to get 296.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2960, and continue the process.

Moving on to step 14:
When dividing 2960 by 312, we get 9 with a remainder of 152.
The next digit of our result is 9. 
Result so far: 70326.612179
Subtracting 2808 from 2960 leaves us with 152.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

On to step 15:
312 goes into 1520 4 times with a remainder of 272.
The number 4 becomes the next digit in our result. 
Result so far: 70326.6121794
Subtracting 1248 from 1520 leaves us with 272.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2720, and continue the process.

On to step 16:
2720 divided by 312 is 8 with a remainder of 224.
Use 8 as the next digit of our solution. 
Result so far: 70326.61217948
If we subtract 2496 from 2720, we get 224.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Our division results in 70326.61217948 with a remaining 2.24e-07.