We look at the division of 551586 by 1 
The aim is to understand the frequency of 1 in 551586.

Moving on to step 1:
1 can be fit into 5 5 times, resulting in a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 5.0
Subtract 5 from 5 to get 0.
Append the next digit (5) from the dividend to 0 and continue with: 5 / 1

Step 2:
1 can be fit into 5 5 times, resulting in a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 55.0
If we take 5 away from 5, we end up with 0.
Include the next digit (1) from the dividend after 0, then repeat: 1 / 1

On to step 3:
1 divided by 1 is 1 with a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 551.0
Deduct 1 from 1 and we're left with 0.
Grab the next digit (5) from the dividend, add it to 0, then carry on: 5 / 1

Advancing to step 4:
If we divide 5 by 1, we get 5 and a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 5515.0
Subtracting 5 from 5 leaves us with 0.
Append the next digit (8) from the dividend to 0 and continue with: 8 / 1

Step 5:
1 goes into 8 8 times with a remainder of 0.
Record the quotient 8 as the next digit in the result. 
Result so far: 55158.0
Subtracting 8 from 8 leaves us with 0.
Include the next digit (6) from the dividend after 0, then repeat: 6 / 1

Moving on to step 6:
1 can be fit into 6 6 times, resulting in a remainder of 0.
The number 6 becomes the next digit in our result. 
Result so far: 551586.0
If we subtract 6 from 6, 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.

Going ahead to step 7:
The number 1 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 551586.0
Subtracting 0 from 0 leaves us 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.

Advancing to step 8:
0 divided by 1 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 551586.0
Subtracting 0 from 0 leaves us 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.

After the division, we end up with 551586.0 and a remainder of 0.0.