We divide 38687721 by 601
The aim is to understand the frequency of 601 in 38687721.

Going ahead to step 1:
When dividing 3 by 601, we get 0 with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Take the next digit (8) from the dividend and append it to 3, then repeat: 38 / 601

Step 2:
If we divide 38 by 601, we get 0 and a remainder of 38.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 38 to get 38.
Bring next digit (6) of the dividend behind the 38 and repeat the process: 386 / 601

Step 3:
If we divide 386 by 601, we get 0 and a remainder of 386.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 386 to get 386.
Grab the next digit (8) from the dividend, add it to 386, then carry on: 3868 / 601

Let's proceed to step 4:
601 can be fit into 3868 6 times, resulting in a remainder of 262.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
If we subtract 3606 from 3868, we get 262.
Include the next digit (7) from the dividend after 262, then repeat: 2627 / 601

Advancing to step 5:
601 can be fit into 2627 4 times, resulting in a remainder of 223.
Write down 4 as next digit of the result. 
Result so far: 64.0
If we take 2404 away from 2627, we end up with 223.
Bring next digit (7) of the dividend behind the 223 and repeat the process: 2237 / 601

On to step 6:
If we divide 2237 by 601, we get 3 and a remainder of 434.
Use 3 as the next digit of our solution. 
Result so far: 643.0
If we subtract 1803 from 2237, we get 434.
Bring next digit (2) of the dividend behind the 434 and repeat the process: 4342 / 601

Going ahead to step 7:
601 can be fit into 4342 7 times, resulting in a remainder of 135.
Use 7 as the next digit of our solution. 
Result so far: 6437.0
If we subtract 4207 from 4342, we get 135.
Take the next digit (1) from the dividend and append it to 135, then repeat: 1351 / 601

Step 8:
The number 601 fits into 1351 2 times, leaving a remainder of 149.
The number 2 becomes the next digit in our result. 
Result so far: 64372.0
If we take 1202 away from 1351, we end up with 149.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1490, and continue the process.

On to step 9:
601 can be fit into 1490 2 times, resulting in a remainder of 288.
The number 2 becomes the next digit in our result. 
Result so far: 64372.2
If we take 1202 away from 1490, we end up with 288.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2880, and continue the process.

On to step 10:
The number 601 fits into 2880 4 times, leaving a remainder of 476.
Use 4 as the next digit of our solution. 
Result so far: 64372.24
Subtract 2404 from 2880 to get 476.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4760, and continue the process.

Let's proceed to step 11:
601 can be fit into 4760 7 times, resulting in a remainder of 553.
Put 7 as the next digit of the answer. 
Result so far: 64372.247
If we subtract 4207 from 4760, we get 553.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5530, and continue the process.

Step 12:
When dividing 5530 by 601, we get 9 with a remainder of 121.
Record the quotient 9 as the next digit in the result. 
Result so far: 64372.2479
Subtracting 5409 from 5530 leaves us with 121.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1210, and continue the process.

Let's proceed to step 13:
601 can be fit into 1210 2 times, resulting in a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 64372.24792
Subtracting 1202 from 1210 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 14:
If we divide 80 by 601, we get 0 and a remainder of 80.
Record the quotient 0 as the next digit in the result. 
Result so far: 64372.24792
Subtracting 0 from 80 leaves us with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Moving on to step 15:
601 can be fit into 800 1 times, resulting in a remainder of 199.
Record the quotient 1 as the next digit in the result. 
Result so far: 64372.2479201
If we subtract 601 from 800, we get 199.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1990, and continue the process.

Going ahead to step 16:
The number 601 fits into 1990 3 times, leaving a remainder of 187.
Use 3 as the next digit of our solution. 
Result so far: 64372.24792013
If we subtract 1803 from 1990, we get 187.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1870, and continue the process.

The quotient of the division is 64372.24792013, and the remainder is 1.87e-07.