73851901 divided by 155 
The aim is to understand the frequency of 155 in 73851901.

Let's proceed to step 1:
The number 155 fits into 7 0 times, leaving a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Include the next digit (3) from the dividend after 7, then repeat: 73 / 155

Advancing to step 2:
The number 155 fits into 73 0 times, leaving a remainder of 73.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 73, we get 73.
Take the next digit (8) from the dividend and append it to 73, then repeat: 738 / 155

Moving on to step 3:
738 divided by 155 is 4 with a remainder of 118.
The next digit of our result is 4. 
Result so far: 4.0
Deduct 620 from 738 and we're left with 118.
Append the next digit (5) from the dividend to 118 and continue with: 1185 / 155

Going ahead to step 4:
155 can be fit into 1185 7 times, resulting in a remainder of 100.
The number 7 becomes the next digit in our result. 
Result so far: 47.0
If we take 1085 away from 1185, we end up with 100.
Append the next digit (1) from the dividend to 100 and continue with: 1001 / 155

Step 5:
If we divide 1001 by 155, we get 6 and a remainder of 71.
Use 6 as the next digit of our solution. 
Result so far: 476.0
The remainder is 71 after subtracting 930 from 1001.
Take the next digit (9) from the dividend and append it to 71, then repeat: 719 / 155

Step 6:
719 divided by 155 is 4 with a remainder of 99.
Record the quotient 4 as the next digit in the result. 
Result so far: 4764.0
If we subtract 620 from 719, we get 99.
Bring next digit (0) of the dividend behind the 99 and repeat the process: 990 / 155

Step 7:
The number 155 fits into 990 6 times, leaving a remainder of 60.
Write down 6 as next digit of the result. 
Result so far: 47646.0
Deduct 930 from 990 and we're left with 60.
Fetch the next digit (1) from the dividend, attach it to 60 and continue: 601 / 155

Step 8:
155 goes into 601 3 times with a remainder of 136.
Record the quotient 3 as the next digit in the result. 
Result so far: 476463.0
The remainder is 136 after subtracting 465 from 601.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Let's proceed to step 9:
155 goes into 1360 8 times with a remainder of 120.
Write down 8 as next digit of the result. 
Result so far: 476463.8
Subtracting 1240 from 1360 leaves us with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Advancing to step 10:
155 can be fit into 1200 7 times, resulting in a remainder of 115.
Use 7 as the next digit of our solution. 
Result so far: 476463.87
Subtracting 1085 from 1200 leaves us with 115.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1150, and continue the process.

On to step 11:
1150 divided by 155 is 7 with a remainder of 65.
Put 7 as the next digit of the answer. 
Result so far: 476463.877
If we subtract 1085 from 1150, we get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

In conclusion, the division gives 476463.877 with a balance of 0.0065.