We look at the division of 371615 by 1 
The aim is to understand the frequency of 1 in 371615.

Step 1:
If we divide 3 by 1, we get 3 and a remainder of 0.
The next digit of our result is 3. 
Result so far: 3.0
Subtracting 3 from 3 leaves us with 0.
Append the next digit (7) from the dividend to 0 and continue with: 7 / 1

On to step 2:
1 goes into 7 7 times with a remainder of 0.
The next digit of our result is 7. 
Result so far: 37.0
If we take 7 away from 7, we end up with 0.
Grab the next digit (1) from the dividend, add it to 0, then carry on: 1 / 1

Going ahead to step 3:
1 goes into 1 1 times with a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 371.0
The remainder is 0 after subtracting 1 from 1.
Fetch the next digit (6) from the dividend, attach it to 0 and continue: 6 / 1

Let's proceed to step 4:
1 goes into 6 6 times with a remainder of 0.
Record the quotient 6 as the next digit in the result. 
Result so far: 3716.0
If we subtract 6 from 6, we get 0.
Include the next digit (1) from the dividend after 0, then repeat: 1 / 1

Moving on to step 5:
1 divided by 1 is 1 with a remainder of 0.
The next digit of our result is 1. 
Result so far: 37161.0
If we subtract 1 from 1, we get 0.
Append the next digit (5) from the dividend to 0 and continue with: 5 / 1

Advancing to step 6:
1 can be fit into 5 5 times, resulting in a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 371615.0
If we subtract 5 from 5, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 7:
1 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 371615.0
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 8:
1 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 371615.0
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 371615.0 with a remainder of 0.0.