39141521 ÷ 913 
The aim is to understand the frequency of 913 in 39141521.

Going ahead to step 1:
The number 913 fits into 3 0 times, leaving a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 913

Let's proceed to step 2:
When dividing 39 by 913, we get 0 with a remainder of 39.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 39 and we're left with 39.
Append the next digit (1) from the dividend to 39 and continue with: 391 / 913

Moving on to step 3:
913 can be fit into 391 0 times, resulting in a remainder of 391.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 391 to get 391.
Fetch the next digit (4) from the dividend, attach it to 391 and continue: 3914 / 913

Let's proceed to step 4:
913 can be fit into 3914 4 times, resulting in a remainder of 262.
The next digit of our result is 4. 
Result so far: 4.0
If we take 3652 away from 3914, we end up with 262.
Take the next digit (1) from the dividend and append it to 262, then repeat: 2621 / 913

Advancing to step 5:
913 can be fit into 2621 2 times, resulting in a remainder of 795.
Use 2 as the next digit of our solution. 
Result so far: 42.0
If we take 1826 away from 2621, we end up with 795.
Append the next digit (5) from the dividend to 795 and continue with: 7955 / 913

On to step 6:
7955 divided by 913 is 8 with a remainder of 651.
Use 8 as the next digit of our solution. 
Result so far: 428.0
If we take 7304 away from 7955, we end up with 651.
Fetch the next digit (2) from the dividend, attach it to 651 and continue: 6512 / 913

Advancing to step 7:
6512 divided by 913 is 7 with a remainder of 121.
The number 7 becomes the next digit in our result. 
Result so far: 4287.0
The remainder is 121 after subtracting 6391 from 6512.
Bring next digit (1) of the dividend behind the 121 and repeat the process: 1211 / 913

Let's proceed to step 8:
The number 913 fits into 1211 1 times, leaving a remainder of 298.
The number 1 becomes the next digit in our result. 
Result so far: 42871.0
If we take 913 away from 1211, we end up with 298.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2980, and continue the process.

Going ahead to step 9:
If we divide 2980 by 913, we get 3 and a remainder of 241.
The number 3 becomes the next digit in our result. 
Result so far: 42871.3
Deduct 2739 from 2980 and we're left with 241.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2410, and continue the process.

Let's proceed to step 10:
When dividing 2410 by 913, we get 2 with a remainder of 584.
Put 2 as the next digit of the answer. 
Result so far: 42871.32
Subtract 1826 from 2410 to get 584.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5840, and continue the process.

Advancing to step 11:
913 goes into 5840 6 times with a remainder of 362.
Record the quotient 6 as the next digit in the result. 
Result so far: 42871.326
If we subtract 5478 from 5840, we get 362.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3620, and continue the process.

Moving on to step 12:
If we divide 3620 by 913, we get 3 and a remainder of 881.
Use 3 as the next digit of our solution. 
Result so far: 42871.3263
Deduct 2739 from 3620 and we're left with 881.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8810, and continue the process.

Advancing to step 13:
913 can be fit into 8810 9 times, resulting in a remainder of 593.
The number 9 becomes the next digit in our result. 
Result so far: 42871.32639
If we subtract 8217 from 8810, we get 593.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5930, and continue the process.

On to step 14:
5930 divided by 913 is 6 with a remainder of 452.
Record the quotient 6 as the next digit in the result. 
Result so far: 42871.326396
Subtracting 5478 from 5930 leaves us with 452.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4520, and continue the process.

Going ahead to step 15:
The number 913 fits into 4520 4 times, leaving a remainder of 868.
Put 4 as the next digit of the answer. 
Result so far: 42871.3263964
If we take 3652 away from 4520, we end up with 868.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8680, and continue the process.

Step 16:
The number 913 fits into 8680 9 times, leaving a remainder of 463.
Use 9 as the next digit of our solution. 
Result so far: 42871.32639649
Deduct 8217 from 8680 and we're left with 463.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4630, and continue the process.

The final result is 42871.32639649 with a remainder of 4.63e-07.