19664425 divided by 931 
The aim is to understand the frequency of 931 in 19664425.

Advancing to step 1:
The number 931 fits into 1 0 times, leaving a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Take the next digit (9) from the dividend and append it to 1, then repeat: 19 / 931

Let's proceed to step 2:
931 goes into 19 0 times with a remainder of 19.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 19 after subtracting 0 from 19.
Take the next digit (6) from the dividend and append it to 19, then repeat: 196 / 931

On to step 3:
The number 931 fits into 196 0 times, leaving a remainder of 196.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 196 to get 196.
Bring next digit (6) of the dividend behind the 196 and repeat the process: 1966 / 931

Moving on to step 4:
931 goes into 1966 2 times with a remainder of 104.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
The remainder is 104 after subtracting 1862 from 1966.
Bring next digit (4) of the dividend behind the 104 and repeat the process: 1044 / 931

Advancing to step 5:
931 goes into 1044 1 times with a remainder of 113.
The number 1 becomes the next digit in our result. 
Result so far: 21.0
Subtract 931 from 1044 to get 113.
Take the next digit (4) from the dividend and append it to 113, then repeat: 1134 / 931

Let's proceed to step 6:
When dividing 1134 by 931, we get 1 with a remainder of 203.
Use 1 as the next digit of our solution. 
Result so far: 211.0
If we take 931 away from 1134, we end up with 203.
Append the next digit (2) from the dividend to 203 and continue with: 2032 / 931

Let's proceed to step 7:
931 can be fit into 2032 2 times, resulting in a remainder of 170.
The next digit of our result is 2. 
Result so far: 2112.0
Subtract 1862 from 2032 to get 170.
Append the next digit (5) from the dividend to 170 and continue with: 1705 / 931

Step 8:
1705 divided by 931 is 1 with a remainder of 774.
The number 1 becomes the next digit in our result. 
Result so far: 21121.0
The remainder is 774 after subtracting 931 from 1705.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7740, and continue the process.

On to step 9:
7740 divided by 931 is 8 with a remainder of 292.
The number 8 becomes the next digit in our result. 
Result so far: 21121.8
The remainder is 292 after subtracting 7448 from 7740.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2920, and continue the process.

Moving on to step 10:
931 goes into 2920 3 times with a remainder of 127.
Use 3 as the next digit of our solution. 
Result so far: 21121.83
If we take 2793 away from 2920, we end up with 127.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1270, and continue the process.

Going ahead to step 11:
1270 divided by 931 is 1 with a remainder of 339.
The number 1 becomes the next digit in our result. 
Result so far: 21121.831
Deduct 931 from 1270 and we're left with 339.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3390, and continue the process.

Moving on to step 12:
The number 931 fits into 3390 3 times, leaving a remainder of 597.
Put 3 as the next digit of the answer. 
Result so far: 21121.8313
If we subtract 2793 from 3390, we get 597.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5970, and continue the process.

Advancing to step 13:
The number 931 fits into 5970 6 times, leaving a remainder of 384.
Put 6 as the next digit of the answer. 
Result so far: 21121.83136
If we take 5586 away from 5970, we end up with 384.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3840, and continue the process.

Moving on to step 14:
The number 931 fits into 3840 4 times, leaving a remainder of 116.
Put 4 as the next digit of the answer. 
Result so far: 21121.831364
Subtracting 3724 from 3840 leaves us 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.

Advancing to step 15:
931 can be fit into 1160 1 times, resulting in a remainder of 229.
Record the quotient 1 as the next digit in the result. 
Result so far: 21121.8313641
Deduct 931 from 1160 and we're left with 229.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2290, and continue the process.

Let's proceed to step 16:
When dividing 2290 by 931, we get 2 with a remainder of 428.
Use 2 as the next digit of our solution. 
Result so far: 21121.83136412
If we take 1862 away from 2290, we end up with 428.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4280, and continue the process.

The final outcome is 21121.83136412, with a leftover of 4.28e-07.